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Preprint ARTICLE | doi:10.20944/preprints202304.0508.v2

Scalar Product for a Version of Minisuperspace Model with the Grassmann Variables

Sergey L. Cherkas, Vladimir L. Kalashnikov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: minisuperspace model; quantum evolution; ghost variables; operator mean values

Online: 9 June 2023 (05:45:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0255.v1

Quantum Effects in General Relativity: Investigating Repulsive Gravity of Black Holes at Large Distances

Piero Chiarelli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: repulsive gravity; quantum black hole; dark energy

Online: 5 June 2023 (07:39:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0201.v1

Spiral Arm Formation of Galaxies Through ROTASE Mechanism Is Perfectly Demonstrated by Falling Rockets Venting Fuel

Hongjun Pan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Spiral arms; Spiral galaxies; X-matter; Black holes; Galaxy evolution; Spirals by rockets

Online: 2 June 2023 (12:05:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0082.v5

Information Theory of Gravity

Jeffrey Alloy Abanto

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Emergent Gravity; MOND; Modified Newtonian Gravity; Mach's Principle

Online: 2 June 2023 (08:26:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0087.v1

Motion of Particles in Schwarzschild Black Hole Surrounded by an External Electrostatic Field

Ahmad Albadawi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Schwarzschild; external electrostatic field; particle motion; Jacobi-elliptic integrals; Lyapunov exponent; effective force

Online: 1 June 2023 (12:24:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.2246.v1

Rlc Electrical Modelling of Black Hole and Early Universe. Generalization of Boltzmann’s Constant in Curved Space-Time

Hector Gerardo Flores

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: RLC electrical model; RC electrical model; cosmology; background radiation; Hubble’s law; Boltzmann´s constant; dark energy; dark matter; black hole

Online: 31 May 2023 (12:47:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202108.0159.v2

On the Vacuum Energy of the Universe at the Galaxy Level, the Cosmological Level and the Quantum Level

Engel Roza

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Milgrom’s acceleration constant; Bekenstein-Hawking entropy; gravitational dipole; dark matter

Online: 23 May 2023 (08:04:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0535.v4

Evidence-Based Cosmology: Black holes as rejuvenating systems of the universe

Srecko Šorli, Rado Gorjup, Štefan Čelan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: evidence-based cosmology; black holes; galactic rotation curves

Online: 22 May 2023 (05:50:25 CEST)

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Preprint REVIEW | doi:10.20944/preprints202305.1410.v1

Towards quantum gravity

Sergey Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: quantum gravity; diffeomorphism-invariant; Wheeler--DeWitt equation; first order formalism

Online: 19 May 2023 (08:29:33 CEST)

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Preprint REVIEW | doi:10.20944/preprints202305.0973.v2

The Andromeda Galaxy and its Star Formation History

Denis Leahy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: spiral galaxies; star formation; galactic structure; galaxy formation

Online: 19 May 2023 (07:24:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1256.v1

SN 2017fzw: A Fast-expanding Type Ia Supernova with Transitional Features

Jia-Yu Huang, Yang-Yang Li, Xiang-Yun Zeng, Sheng Zheng, Sarah A.Bird, Ju-Jia Zhang, Ali Esamdin, Abdusamatjan Iskandar, K. Azaleee Bostroem, Shuguang Zeng, Yan-shan Xiao, Yao Huang, D. Andrew Howell, Curtis McCully, Wen-Xiong Li, Tian-Meng Zhang, Li-Fan Wang, Lei Hu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: supernovae; general; supernovae; individual: SN 2017fzw; transitional supernovae

Online: 17 May 2023 (14:21:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0385.v2

Energy Based True Definition of Cosmic Red Shift and Quantum Halt of the Current Universe Having Light Speed Rotation

U. V. Satya Seshavatharam, S. Lakshminarayana

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: True definition of cosmic red shift; Hubble-Hawking universe; Light speed expansion; Light speed rotation; Cosmic halt with quantum physics

Online: 15 May 2023 (10:07:01 CEST)

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Preprint REVIEW | doi:10.20944/preprints202305.0973.v1

The Andromeda Galaxy and its Star Formation History

Denis Leahy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: spiral galaxies; star formation; galactic structure; galaxy formation

Online: 15 May 2023 (03:54:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0770.v1

NUVO Model for the Grand Unified Theory Initial Formalization Part I: Cosmic Scale

Rickey Austin

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: General Relativity; Special Relativity; Newtonian Mechanics; time dilation; theory; inertia; orbital advance; light path curvature; Planck Units; NUVO

Online: 10 May 2023 (14:50:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202212.0088.v2

The Natural Unit Expression of Classical Gravity

David Humpherys

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: gravitational constant; classical gravity; Planck units; natural units; radial density; Schwarzschild radius

Online: 9 May 2023 (07:41:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0567.v1

Electromagnetic Waves in Cosmological Spacetime

Denitsa Staicova, Michail Stoilov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Friedman metric; electromagnetic waves; redshift; amplitude change; dispersion; Klein–Gordon equation; tachyon inflation

Online: 9 May 2023 (04:49:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0484.v1

Critical Compactness Bound of a Select Class of Compact Stars

Satarupa Barman, Ranjan Sharma

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Compact star; Tidal force; Stability; Exact solution

Online: 8 May 2023 (08:53:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0468.v1

A Wheeler-DeWitt Quantum Approach to the Branch-cut Cosmology with Ordering Parameters

Benno Bodmann, César Augusto Zen Vasconcellos, Peter Hess, José de Freitas Pacheco, Dimiter Hadjimichef, Moises Razeira, Gervásio Annes Degrazia

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Branch-cut cosmology; Wheeler-DeWitt equation; quantum gravity

Online: 8 May 2023 (08:27:08 CEST)

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In this contribution to the Festschrift for Prof. Remo Ruffini, we investigated a formulation of quantum gravity based on the Wheeler-DeWitt (WDW) equation combined with the classical concepts of the branch-cut cosmology, which contemplates as a new scenario for the origin of the Universe, a smooth transition region between the contraction phase, prior to the primordial singularity, and the subsequent expansion phase. Through the introduction of an energy-dependent effective potential, which describes the space-time curvature associated with the embedding geometry and its coupling with the cosmological constant and matter fields, solutions of the WDW equation for the wave function of the Universe are obtained. The Lagrangian density is quantized through the standard procedure of raising the Hamiltonian, the helix-like complex scale factor of branched cosmology as well as the corresponding conjugate momentum to the category of quantum operators. As a novelty, ambiguities in the ordering of the quantum operators are overcome with the introduction of a set of ordering factors α, whose values are restricted to the integers α=[0,1,2], since non-integers have no physical meaning, allowing this way a broader class of solutions for the wave function of the Universe. As another novelty, additional energy-dependent parametrizations are considered, more specifically, in addition to a branched universe filled with underlying background vacuum energy, matter and radiation, in order to make contact with standard model calculations, we additionally supplement the formulation with baryon matter, dark matter and quintessence contributions. As an additional novelty, the boundary conditions for the wave function of the Universe are imposed by assuming the Bekenstein criterion. Our results indicate this way, as a novelty conclusion, the consistency of a topological quantum leap, or alternatively a quantum tunneling, for the transition region of the early universe in contrast to the classic branched cosmology view of a smooth transition.

Preprint ARTICLE | doi:10.20944/preprints202304.1059.v1

35-Day and Orbital RXTE/PCA X-Ray Lightcurves of Hercules X-1

Denis Leahy, Sandra Gonzalez Enriquez

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: neutron stars; X-ray binaries; accretion disks

Online: 27 April 2023 (07:59:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0508.v1

Scalar Product for a Version of Minisuperspace Model with the Grassmann Variables

Sergey L. Cherkas, Vladimir L. Kalashnikov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: minisuperspace model; quantum evolution; ghost variables; operator mean values

Online: 18 April 2023 (08:49:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0381.v1

Oscillating Sequential Universes Model: A Novel Approach to Understand the Evolution of Universe

Mehmet Fırat

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Oscillating Sequential Universes Model; Universe's Evolution; dark energy; dark matter

Online: 17 April 2023 (03:22:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0145.v1

A Variational Approach to Resistive General Relativistic Two-Temperature Plasmas

Gregory Comer, Nils Andersson, Thomas Celora, Ian Hawke

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: general relativity, fluids, plasmas, compact objects, accretion discs

Online: 10 April 2023 (04:39:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0137.v1

Solving the Problems of Dark Energy and the Hubble Constant Using Corrected Hubble’s Law

Askar Abdukadyrov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Galaxies; redshift; Hubble’s law; dark energy; Hubble constant

Online: 10 April 2023 (03:47:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0535.v3

Evidence-Based Cosmology: Black holes as rejuvenating systems of the universe

Srecko Šorli, Rado Gorjup, Štefan Čelan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: evidence-based cosmology; black holes; galactic rotation curves

Online: 6 April 2023 (09:50:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202302.0353.v2

Multilayer and Multilevel Cosmological Models Based on So-Lutions of the Extended Einstein Field Equations

Mikhail Batanov-Gaukhman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmological model; multilayer and multilevel cosmological model; Kottler metric; Einstein’s field equations; metric signature; signature, geometrized physics

Online: 4 April 2023 (03:51:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0535.v2

Evidence-Based Cosmology: Black holes as rejuvenating systems of the universe

Srecko Šorli, Rado Gorjup

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: evidence-based cosmology; rotating superfluid space; galactic rotation curves

Online: 3 April 2023 (07:28:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0009.v1

Theoretical Explanation and Experimental Design of the Origin of Earth's Magnetic Field, Stellar Magnetic Field, and Neutron Star Magnetic Field

Sheng Qin

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: earth's magnetic field; neutron star magnetic fields; planetary magnetic fields

Online: 3 April 2023 (05:17:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0544.v1

Constraining Neutrino Mass in Dynamical Dark Energy Cosmologies With the Logarithm Parametrization and the Oscillating Parametrization

Rui-Yun Guo

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dynamical dark energy; neutrino mass; mass hierarchies of neutrinos; the observational constraints

Online: 31 March 2023 (07:21:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0535.v1

Evidence-Based Cosmology and Galactic Rotation Curves

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: evidence-based cosmology; rotating superfluid space; galactic rotation curves

Online: 31 March 2023 (03:07:15 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202303.0384.v2

A Newtonian Approach to General Black Holes

Alain Haraux

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: gravitation; velocity of light; photons; escape velocity; black holes

Online: 28 March 2023 (02:39:58 CEST)

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Preprint REVIEW | doi:10.20944/preprints202303.0387.v1

PhD Thesis: Weak Lensing analysis of an all-sky simulation

Carlos Lopez-Arenillas, Enrique Gaztanaga, Pablo Fosalba

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology, Cosmic Survey, gravitational lensing

Online: 22 March 2023 (02:48:47 CET)

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This Thesis is concerned with one of the most promising probes to constrain the "Dark Universe", and, particularly, the dark matter distribution. Based on MICE cosmological simulation, and the all-sky convergence maps generated by Fosalba et al. [58], we perform a mass calibration of the dark matter halos there contained up to z=1. In order to do that, we analyse the average halo density proÖles of all the halos with masses ranging from 5E13 to 3.75E14 M/h , divided into four mass bins and three redshift bins. Through this analysis we address two main issues: the relatively low mass resolution of the simulation (mp=2.34E11M/h) and the relatively high softening length (lsoft=50Kpc/h). We do that by using a two-step procedure. First, we simulate analytical pure NFW density proÖles (with di§erent mass resolutions) using two input values: the virial radii of MICE halos and the expected concentrations, according to the Öxed mass-concentration relation from Oguri and Hamana [130]. Second, we model the e§ect of the softening length with a Gaussian Ölter, smoothing the halo core. The results show that MICE halos are, in average, NFW halos. Best-fit NFW radii are in very good agreement with the average radii of our samples, overestimating the data by ~1%, but best-fit NFW concentrations are in average 50% lower than the expected values. It is possible to account for part of this deviation by distinguishing between relaxed and unrelaxed halos, finding that, depending on the degree of relaxedness, the improvement can be as high as 30%. We also find that the analytical NFW halos simulated with MICE mass resolution have an overall concentration 40% lower than the input concentration, in the case of 3D proÖles, and 25% lower in that of the projected profiles. The Gaussian-smoothed NFW profile is a good approximation for our projected halos. Additionally, we analyse the morphology of the halos, characterizing their triaxiality at R200 and calculating their orientation with respect to the line-of-sight (LOS). MICE halos tend to adopt a more prolate morphology, as might be expected from a CDM simulation (Shaw et al. [159]), and the percentage of prolate halos grows as their mass grows. The mass resolution is, nonetheless, not good enough to draw conclusive inferences from the shape analysis, but it allows us to discern a trend and estimate the e§ect of halo shape and orientation on the weak lensing masses. Finally, we use the all-sky convergence maps to study the scatter in mass measurements of MICE halos. We determine the intrinsic scatter in the recovered masses by assuming the smoothed NFW profile as the 'true' profile, and creating two new convergence maps from different mass cuts. We estimate also the scatter due to the correlated structure by studying the angles between the major axes of the halos and the LOS, and also that due to projection e§ects (i.e. all the dark matter between observer and source). We Önd an irreducible scatter (intrinsic) of 10-14%, a scatter around a 30% of the intrinsic one due to correlated structure, and a scatter around 40-70% of the intrinsic one due to projection e§ects. The size of our halo sample allows us to improve the characterization of the cosmic noise, of great importance for present and future surveys.

Preprint BRIEF REPORT | doi:10.20944/preprints202303.0384.v1

A Newtonian approach to general black holes

Alain Haraux

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: gravitation, velocity of light, photons, escape velocity, black holes.

Online: 22 March 2023 (02:12:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints202303.0327.v1

Inference of Dynamic Geophysical Conditions and Probability of Advanced Life in Potentially Habitable Rocky Exo Planets

Varnana M. Kumar, Girish T. E., Eapen P. E., Thara N. Sathyan, Biju Longhinos, Sony K. S., Binoy J.

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: habitable planets; exo planets; advanced life; M stars; geophysical conditions

Online: 17 March 2023 (13:48:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202209.0279.v3

Light Speed Expanding Hubble-Hawking Universe

U.V.S. Seshavatharam, S. Lakshmanarayana

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble-Hawking model; Light speed expansion; Black hole universe; Power law super gravity of baryonic mass; 200 million solar masses

Online: 13 March 2023 (10:26:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v16

Vacuum Expansion and Collapse Inside an Infinite Shell

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 13 March 2023 (09:47:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints202207.0121.v5

The Cyclic Universe, the Big Bang Was Not the Beginning, but a Repeating Pattern of Expansion and Contraction of the Space-Time

Amrit Ladhani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: The Cyclic Universe; Big Bang and Big Crunch; Cosmology; Gravitational force; Dark Energy; Dark Matter

Online: 6 March 2023 (16:14:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0427.v2

On the Thermodynamics of Matter

Naman Kumar

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Extra Dimension; Thermodynamics and Gravity; Quantum Focusing; Null surfaces

Online: 6 March 2023 (14:06:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202303.0084.v1

Dark Energy Can be Delivered to the Universe by Stochastic Nonlinear Gravitational Waves Coming from “Nowhere“

Leonid Marochnik

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy; gravitational waves

Online: 6 March 2023 (03:30:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202210.0280.v2

Light Deflection by Traversable Wormhole in a Curvature-Coupled Antisymmetric Background Field

Wajiha Javed, Touqeer Zahra, Reggie C. Pantig, Ali Övgün

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: General Relativity; Gravitational lensing; Dark Matter, Gauss-Bonnet Theorem; Plasma Medium; Wormhole

Online: 28 February 2023 (15:59:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0486.v1

MHD Simulation in the Solar Corona to Obtain Conditions for the Acceleration of Cosmic Rays during Solar Flares

Alexander Podgorny, Igor Podgorny, Alexei Borisenko

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar flare; solar cosmic rays; current sheet; magnetohydrodynamic simulation; active region

Online: 28 February 2023 (02:23:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0430.v1

Cyanide Molecular Laser-Induced Breakdown Spectroscopy with Current Databases

Christian Parigger

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: diatomic molecules; cyanide; laser-plasma; data analysis; laser induced breakdown spectroscopy; combustion; time-resolved spectroscopy; spectra fitting program; astrophysics

Online: 27 February 2023 (02:28:52 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0427.v1

On the Thermodynamics of Matter

Naman Kumar

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Alternative Gravity, Thermodynamics of Black Holes. Quantum Focusing Conjecture, Thermodynamics and Gravity

Online: 24 February 2023 (15:41:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0353.v1

Multilayer and Multilevel Cosmological Models Based on So-Lutions of the Extended Einstein Field Equations

Mikhail Batanov-Gaukhman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmological model; multilayer and multilevel cosmological model; Kottler metric; Einstein’s field equations; metric signature; signature, geometrized physics

Online: 21 February 2023 (06:28:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202110.0275.v2

Cosmological Expansion Rate–Various Measurement Results and Interpretation

Volkmar Müller

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmological expansion; Earth expansion; common expansion rates; recession velocity / relative velocity; examples

Online: 21 February 2023 (02:28:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v15

Vacuum Expansion and Collapse Inside an Infinite Shell

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 13 February 2023 (16:12:56 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0110.v1

Stark Broadening of Al IV Spectral Lines

Milan S. Dimitrijević, Magdalena D. Christova

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Stark broadening; Al IV; line profiles; atomic data; atomic processes; line formation; stellar atmospheres

Online: 7 February 2023 (02:35:14 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0230.v3

Dark Matter Puzzle Solution

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy; dark matter; Lense-Thirring effect; Sagnac effect

Online: 30 January 2023 (09:20:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0318.v2

A Mechanical Newton-Einstein Hybrid Gravity based on Matter-vacuum Equilibrium Mediated by Gravitons

Gaurav Goyal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: quantum gravity; alternate theory of gravity

Online: 28 January 2023 (09:44:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0398.v1

Tolman VI fluid sphere in f(R,T) gravity

Monimala Mondal, Farook Rahaman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Tolman VI spacetime, Compact stars; $f(R,T)$ gravity

Online: 23 January 2023 (06:33:50 CET)

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Preprint BRIEF REPORT | doi:10.20944/preprints202301.0390.v1

Doppler Shift Effect as a Possible Explanation to the Hubble-Lemaitre Constant Tension

Lior Shamir

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble constant; Hubble constant tension; cosmology

Online: 23 January 2023 (02:12:01 CET)

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Preprint SHORT NOTE | doi:10.20944/preprints202301.0337.v1

The Mass of Our Observable Universe

Enrique Gaztanaga

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Dark Energy; General Relativity; Black Holes

Online: 18 January 2023 (10:32:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0318.v1

A Mechanical Newton-Einstein Hybrid Gravity based on Matter-vacuum Equilibrium Mediated by Gravitons

Gaurav Goyal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: quantum gravity; alternate theory of gravity

Online: 18 January 2023 (03:51:51 CET)

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Preprint HYPOTHESIS | doi:10.20944/preprints202301.0294.v1

The GCDM Model of Universal Density Reduction

Martin Reid Johnson

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark Energy, Entropic Energy, Suprathermal Energy

Online: 17 January 2023 (01:53:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0230.v2

Dark Matter Puzzle Solution

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy; dark matter; Lense-Thirring effect; Sagnac effect

Online: 17 January 2023 (01:22:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints202301.0230.v1

Dark Matter Puzzle Solution

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy; dark matter; Lense-Thirring effect

Online: 13 January 2023 (01:53:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202109.0323.v6

The Morphology of the Active Galactic Nucleus and its Impact on Accretion Flows and Relativistic Jets

Mohammed Al-Fadhli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Relativistic Jets; Conformal Space-time Background.

Online: 12 January 2023 (13:50:25 CET)

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The G2 gas cloud motion data and the scarcity of observations on the event horizon-scale distances have challenged the comprehensiveness of the central supermassive black hole model. In addition, the Planck Legacy 2018 release has preferred a positively curved early Universe with a confidence level higher than 99%. This study investigates the impact of the background curvature and its evolution over the conformal time on the formation and morphological evolution of central compact objects and the consequent effect on their host galaxies. The formation of a galaxy from the collapse of a supermassive gas cloud in the early Universe is modeled based on interaction field equations as a 4D relativistic cloud-world that flows and spins through a 4D conformal bulk of a primordial positive curvature considering the preference of the Planck release. Owing to the curved background, this scenario of galaxy formation reveals that the core of the galaxy undergoes a forced vortex formation with a central event horizon leading to opposite vortices (traversable wormholes) that spatially shrink while evolving in the conformal time. It indicates that the galaxy and its core are formed in the same process whereas the surrounding gas clouds form the spiral arms due to the frame-dragging induced by the fast-rotating core. It demonstrates that the accretion flow onto the central supermassive compact object only occurs at the central event horizon of the two opposite vortices while their other ends eject the relativistic jets. This can elucidate the relativistic jet formation and explain the G2 gas cloud motion if its orbit is around one of the vortices but at a distance from the central event horizon. The gravitational potential of the early curved bulk could contribute to galaxy formation while the present spatial flatness deprives the potential of bulk which could lead to galaxy quenching. The formation of a galaxy and its core simultaneously could explain the growth of the supermassive compact galaxy core to a mass of ~10⁹ M_⊙ at just 6% of the current Universe age.

Preprint ARTICLE | doi:10.20944/preprints202208.0046.v2

Solar Activity Cycles Recur Epidemic and Pandemic Viruses: Space Weather Alerts

Ramy Mawad, Hanafy M. Madbouly, Ehab M. B. Mahdy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Space weather; Solar terrestrial connection; Climate change; Solar cycle; Environment; Epidemiology

Online: 12 January 2023 (02:36:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v14

Vacuum Expansion and Collapse Inside an Infinite Shell

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 9 January 2023 (11:01:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202210.0329.v2

4D Einstein--Gauss--Bonnet Gravity Coupled to Modified Logarithmic Nonlinear Electrodynamics

Sergey I. Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Einstein--Gauss--Bonnet gravity; nonlinear electrodynamics; thermodynamics; entropy; shadow; energy emission; quasinormal modes

Online: 4 January 2023 (12:37:29 CET)

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Preprint ARTICLE | doi:10.20944/preprints202209.0279.v2

Light Speed Expanding Hubble-Hawking Universe

Seshavatharam U.V.S., Lakshmanarayana S.

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble-Hawking model; Light speed expansion; Black hole universe; Power law super gravity of baryonic mass; 200 million solar masses

Online: 4 January 2023 (12:20:26 CET)

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Based on four major cosmological and astrophysical coincidences, it seems possible to develop a new model of Hubble-Hawking Universe having light speed expansion. First Coincidence is - distance travelled by light in 14 billion years seems to equal to the currently believed cosmic Hubble radius. Second Coincidence is - Product of currently believed cosmic critical density and cosmic Hubble volume seems to be equal to the black hole mass of the current Hubble universe. Third Coincidence is - Currently believed cosmic temperature seems to be equal to the geometric mean of Hawking temperature of Planck mass and Hawking temperature of current Hubble mass. Fourth coincidence is - single big bang having evolution that resembles a light speed growing Planck mass. Considering the analysis of 740 super novae data, it is possible to consider a constant rate of cosmic expansion. As there is no physical reasoning for the observed speed of light and all the cosmological observations are completely based on speed of light-by considering ‘light speed expansion’ concept as a characteristic nature of the universe, big bang, inflation, dark energy, quintessence and lambda term like ideal and unidentified concepts can be reviewed and relinquished at fundamental level and a practical model of expanding universe can be developed with ease and clarity. In this context, we encourage the reader to see Figure 1 pertaining to light travel distances prepared with . For a comparison, readers are encouraged to visit https://cosmocalc.icrar.org/ and http://www.atlasoftheuniverse.com/cosmodis.c. It may be noted that, considering 200 million solar masses as a cut off for ordinary gravity, dark matter can be considered as an effect of power law based super gravity of galactic baryonic mass. It is well believed that, Hawking’s findings about black holes are the most important contributions to physics in recent decades. Hence, we appeal the science community to recommend our Hubble-Hawking model for further research and study.

Preprint ARTICLE | doi:10.20944/preprints202201.0301.v13

The Hyperboloidal Universe

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 4 January 2023 (12:00:14 CET)

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This paper investigates a relativistic model of the Universe in which the geometry describes a 4D version of the 2-sheeted hyperboloid that is isotropic, homogeneous in space at a given time and inhomogeneous in time. The internal Schwarzschild metric is used for this model, which is justified by the fact that spherically-symmetric empty spaces in the Universe are effectively surrounded by a shell of infinite mass (the surrounding Universe and in particular, the infinitely dense mass at the Big Bang). Thus the metric for the empty spaces must be described by the Schwarzschild metric according to Birkhoff’s theorem. Since the shell’s mass is infinite, the external solution cannot describe this spacetime and therefore the internal Schwarzschild solution must be the correct metric for this spacetime. The important insight here is that the source of the metric is not at r = 0, but that the event horizon is the metric source in both cases, representing a location/time of infinite density. This is supported by looking at the internal geometry in Kruskal coordinates where the event horizon surrounds the vacuum at an infinite distance, meaning the Schwarzschild radius, and therefore mass, of the source shell is infinite. The full spatial homogeneity of the internal metric is also demonstrated by visualizing at the Schwarzschild geometry (with 2 spatial dimensions and the time dimension) in Kruskal coordinates. The model predicts both a Universe and Anti-Universe moving in opposite directions of time undergoing an expansion phase, followed by a collapsing phase. Using only the current coordinate age of the Universe and transition redshift, it predicts the accelerated expansion and it is shown that its Hubble diagram fits currently available supernova and quasar data as well as predicting a Hubble constant H₀ ≈ 71.6km/s/M pc. The angular term of the metric describes time dilation caused by the relativistic kinematic precession effect known as Thomas Precession which can be interpreted as spin about the time dimension. The model also makes two novel predictions: that the early Universe should have structures older than expected due to an increased amount of proper time relative to coordinate time in that era and that the background Universe should appear brighter than current models predict.

Preprint ARTICLE | doi:10.20944/preprints202301.0071.v1

Crater Formation under Extreme Space Weather Conditions

Jacob Gable, Eugene Bagashov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Carrington event; craters; cratering; currents in plasma; electric discharge machining; geology; heliophysics; impact craters; Late Heavy Bombardment; piezoelectricity; transient crater; solar activity; Solar System

Online: 4 January 2023 (07:19:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202005.0250.v11

Entangled Dual Universe

Mohammed B. Al-Fadhli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Duality; Antimatter; Brane-World Modified Gravity.

Online: 29 December 2022 (11:31:00 CET)

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Advances in cosmology and astronomical observations over the last two decades have revealed significant tensions and many ambiguities within the standard model of cosmology of a spatially flat Universe, the lambda cold dark matter model. Moreover, the recent Planck Legacy 2018 (PL18) release has confirmed the presence of an enhanced lensing amplitude in the cosmic microwave background (CMB) power spectra, which prefers a positively curved early Universe with a confidence level higher than 99%. This paper addresses the study of a quantum mechanism that could replace the concept of dark matter and energy by considering a primordial curvature as preferred by the PL18 release while yielding the present-day spatial flatness. The implied primordial curvature is incorporated as the background curvature to extend the field equations in terms of the brane-world modified gravity. The Universe evolution is modelled by utilizing a new wavefunction of the Universe that propagates in the bulk with reference to the scale factor of the early Universe and its radius of curvature upon the emission of the CMB, which revealed both positive and negative solutions. This characteristic implies that a pair of entangled wavefunctions was created and evolved in opposite directions as a manifestation of distinct matter and antimatter sides of the Universe. The wavefunction indicates a nascent hyperbolic expansion away from early energy is followed by a first phase of decelerating expansion during the first 10 Gyr, and then, a second phase of accelerating expansion in reverse directions, whereby both sides free-fall towards each other under gravitational acceleration. The predicted background curvature evolution demonstrates the fast orbital speed of outer stars owing to external fields exerted on galaxies as they travelled through earlier conformally curved spacetime. Finally, the wavefunction predicts an eventual phase of rapid spatial contraction that culminates in a Big Crunch, signaling a cyclic Universe. These findings reveal that early plasma could be separated and evolved into distinct sides of the Universe that collectively and geometrically inducing its evolution, physically explaining the effects attributed to dark matter and energy.

Preprint ARTICLE | doi:10.20944/preprints202212.0545.v1

A Possible Role of the Energetically Excited Quantum Vacuum in Cosmology:A Potential Solution to the Horizon and Flatness Problems–The Excitation Energy Dominated Era

Laszlo Marosi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Flatness problem; horizon problem; cosmic microwave background anisotropy; isothermization; thermalization

Online: 28 December 2022 (12:46:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints202212.0447.v1

White Holes are Christmas Magic

Enrique Gaztanaga

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Dark Energy; General Relativity; Black Holes

Online: 23 December 2022 (06:37:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202212.0284.v1

Galaxy Number Counts from the Sloan Digital Sky Survey

John Herbert Marr

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: number counts; galaxies: evolution

Online: 15 December 2022 (14:53:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202212.0088.v1

The Natural Unit Expression of Classical Gravitation

David Humpherys

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: classical gravitation, Planck units, natural units, radial density, Planck scale, proportionality

Online: 6 December 2022 (02:26:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202009.0215.v6

Galactic Symmetry

Richard Oldani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: time; clocks; quantum mechanics; relativity theory; conjugate variables; non-inertial; space-time linearity; energy

Online: 5 December 2022 (10:32:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202105.0488.v8

The Solar System: Nature and Mechanics

Mario Ljubičić

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar system; complete relativity; nature; mechanics

Online: 2 December 2022 (09:58:14 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0418.v1

Rigorous Analysis of the Universal Space Expansion

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: methodology of scientific thinking; universe expansion

Online: 22 November 2022 (10:00:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202009.0307.v5

Dynamics of Stochastic-constrained Particles

Tao Guo

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: randomly moving particles; effects of location aggregation; relaxed galaxy clusters; generalized diffusion equation

Online: 10 November 2022 (03:53:56 CET)

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Preprint SHORT NOTE | doi:10.20944/preprints202211.0174.v1

On a 2D Variant of Newton's Gravitational Law and the MOND Theory

Alain Haraux

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: gravitation; MOND theory; galactic velocity curves

Online: 9 November 2022 (10:21:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202009.0215.v5

Galactic Symmetry

Richard Oldani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: time; clocks; quantum mechanics; relativity theory; conjugate variables; non-inertial; space-time linearity; energy

Online: 7 November 2022 (10:59:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0107.v1

QED and Higgs-like Domain wall in Einstein-Cartan gravity

Luiz Andrade

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: preheating; torsion; Einstein-Cartan; magnetic helicity; Proca Cartan ED

Online: 7 November 2022 (06:03:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0010.v1

Radio Emission from Supernova Remnants: Model vs. Observations

Denis Alan Leahy, Felicity Merrick, Miroslav Filipovic

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: supernova remnants; radio emission

Online: 1 November 2022 (02:20:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v12

The Hyperboloidal Universe

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 21 October 2022 (11:18:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202210.0329.v1

4D Einstein--Gauss--Bonnet Gravity Coupled to Modified Logarithmic Nonlinear Electrodynamics

Sergey I. Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Einstein--Gauss--Bonnet gravity; nonlinear electrodynamics; thermodynamics; entropy; shadow; energy emission; quasinormal modes

Online: 21 October 2022 (10:15:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202210.0280.v1

Weak Deflection Angle for Curvature-Coupled Antisymmetric Wormhole Solution

Wajiha Javed, Touqeer Zahra, Reggie Pantig, Ali Övgün

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: General Relativity; Gravitational lensing; Dark Matter, Gauss-Bonnet Theorem; Plasma Medium; Wormhole

Online: 19 October 2022 (10:07:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0082.v4

Information Theory of Gravity

Jeffrey Alloy Abanto

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Emergent Gravity; MOND; Modified Newtonian Gravity; Mach's Principle

Online: 12 October 2022 (10:17:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v11

The Hyperboloidal Universe

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 29 September 2022 (10:04:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0488.v7

The Solar System: Nature and Mechanics

Mario Ljubičić

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar system; complete relativity; nature; mechanics

Online: 27 September 2022 (05:09:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0279.v1

Light Speed Expanding Hubble-Hawking Universe

Seshavatharam U.V.S., Lakshmanarayana S.

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble-Hawking model; Light speed expansion; Black hole universe; Power law super gravity of baryonic mass; 200 million solar masses

Online: 19 September 2022 (10:34:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0122.v1

The Black Hole Universe, part II

Enrique Gaztanaga

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Dark Energy; General Relativity; Black Holes

Online: 8 September 2022 (09:18:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0070.v1

Density and Velocity Analysis of the Planetary Nebula NGC 6853

Robert Hrubý

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Nebula; NGC 6853; Stellar; Planetary nebula; Deep space; remnant

Online: 5 September 2022 (14:08:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v10

The Hyperboloidal Universe

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 31 August 2022 (14:35:15 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202208.0464.v2

SMBH Relativistic Gravity and Dark Matter

Štefan Čelan, Amrit Sorli, Niko Gorjup

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: kinetic energy of rotating SMBH; gravity; dark matter

Online: 29 August 2022 (15:42:06 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202208.0464.v1

SMBH Relativistic Gravity and Dark Matter

Štefan Čelan, Amrit Sorli, Niko Gorjup

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: kinetic energy of rotating SMBH; gravity; dark matter

Online: 26 August 2022 (14:20:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0215.v4

Galactic Symmetry

Richard Oldani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: time; clocks; quantum mechanics; relativity theory; conjugate variables; non-inertial; space-time linearity; energy

Online: 26 August 2022 (11:33:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0121.v4

The Beginning to the End of the Universe and Eternal Space-time

Amrit Ladhani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: eternal Space-time; Big Bang and Big Crunch; cosmology; gravitational force; dark energy

Online: 19 August 2022 (04:35:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0173.v1

Weak Interaction Dependent Super Gravity of Galactic Baryon Mass

Satya Seshavatharam U.V, S Lakshminarayana

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark matter; Weak interaction; Super gravity of baryonic matter; flat rotation speed; Hubble mass; Hubble radius

Online: 9 August 2022 (04:58:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0164.v1

Was Cosmic Inflation Driven by Quantum Field or Its Product ?

Biping Gong

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: magnetic monopole; inflation, scalar field; Grand Unification theories

Online: 9 August 2022 (03:14:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0136.v1

Nonsingular phantom cosmology in Five Dimensional f(R,T) Gravity

Rakesh Ranjan Sahoo, Kamal Lochan Mahanta, Saibal Ray

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Phantom energy; LRS Bianchi type-I; $f(R,T)$ theory; $5d$ spacetimes

Online: 8 August 2022 (08:11:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0085.v2

The Inner and Backside Solar Flares

Ramy Mawad

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: The Sun; Solar Flare; Solar Core; Solar Interior layers; Radiative Zone; Convection Zone

Online: 5 August 2022 (14:59:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0085.v1

The Solar Flares Demonstrate the Solar Interior Layers: The Inner and Backside Solar Flares

Ramy Mawad

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: The Sun; Solar Flare; Solar Core; Solar Interior layers; Radiative Zone; Convection Zone

Online: 3 August 2022 (10:45:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0046.v1

Solar Activity Cycles Recur Epidemic and Pandemic Viruses: Space Weather’s Alerts

Ramy Mawad, Hanafy M. Madbouly, Essam Ghamry, Ehab M. B. Mahdy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Space weather; Solar terrestrial connection; Climate change; Solar cycle; Environment; Epidemiology

Online: 2 August 2022 (07:50:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0396.v1

Asymmetry in Galaxy Spin Directions -- Analysis of Data from DES and Comparison to Four Other Sky Surveys

Lior Shamir

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Galaxies; Large-scale structure of Universe; Cosmic anisotropy

Online: 26 July 2022 (08:08:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0390.v1

Weak Gravitational Lensing in Dark Matter and Plasma Mediums for Wormhole-like Static Aether Solution

Wajiha Javed, Sibgha Riaz, Reggie C. Pantig, Ali Övgün

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: general relativity; gravitational lensing; wormhole-like static aether solution; Gauss-Bonnet theorem; plasma and non-plasma mediums; dark matter; modified gravity

Online: 26 July 2022 (06:12:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0343.v1

Trajectory of Massive Particles around a Static Black Hole in f(R) Gravity

Surajit Mandal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Massive particle; Static black hole; f(R) gravity; Pseudo-Newtonian Potential

Online: 22 July 2022 (14:14:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202202.0311.v3

The Stochastic Gravitational-Wave Background Exists Permanently and Has Time-Domain Asymmetry

Andrey Kramarenko, Alexander Kramarenko

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Gravitational background; Gravitational waves; correlation analysis; digital filters

Online: 19 July 2022 (10:33:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v9

Th Hyperboloidal Universe

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Black holes; Dark Energy; Schwarzschild metric

Online: 19 July 2022 (10:32:16 CEST)

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