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Subject: Physical Sciences, Astronomy And Astrophysics Keywords: perturbed FLRW metric; Einstein equations; particle Lagrangian; gravitational lensing; distance ladder; Hubble constant

Online: 9 April 2024 (09:38:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0580.v1

Doppler Tomography of the Circumstellar Disk of the Be Star κ Draconis

Ilfa A. Gabitova, Anatoly S. Miroshnichenko, Sergey V. Zharikov, Ainash Amantayeva, Serik A. Khokhlov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: spectroscopy; Doppler tomography; binary system; emission-line stars; circumstellar matter; variable stars

Online: 9 April 2024 (07:11:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0549.v1

The Schwarzschild-de Sitter Metric of Nonlocal dS Gravity

Ivan Dimitrijevic, Branko Dragovich, Zoran Rakic, Jelena Stankovic

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: nonlocal de Sitter gravity; Schwarzschild-de Sitter metric; rotation curves of spiral galaxies; dark matter and dark energy

Online: 8 April 2024 (16:04:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0215.v7

Galactic Symmetry

Richard Oldani

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

Online: 8 April 2024 (11:40:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0421.v1

Solving the Hubble Tension Using the Union2 Supernova Database

Espen Haug, Eugene Tatum

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble tension; Hubble constant; Cosmological red-shift; z; CMB temperature.

Online: 5 April 2024 (08:40:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0363.v1

High–Redshift Quasars at z

z \geq 3

Yulia Sotnikova, Alexander Mikhailov, Timur Mufakharov, Tao An, Dmitry Kudryavtsev, Marat Mingaliev, Roman Udovitskiy, Anastasia Kudryashova, Vlad Stolyarov, Tamara Semenova

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; active; galaxies; high-redshift; quasars; general; radio continuum; galaxies

Online: 4 April 2024 (10:08:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0306.v1

Estimation of Pointing Errors of Large Radio Telescopes under Solar Radiation Based on Digital Twin

Shanxiang Wei, Deqing Kong, Binlan Wang, Lianbo Fu, Wenrong Xiao, Zongming Yin, Yongxiang Li, Zhouzhou Xiao

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: digital twin; radio telescope; pointing error; solar radiation

Online: 3 April 2024 (14:28:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0159.v1

How a Thermodynamic Version of the Friedmann Equation Appears to Solve the Early Galaxy Formation Problem

Espen Haug, Eugene Tatum

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: ; Cosmic time; thermodynamic Friedmann equation; early galaxy formation; CMB temperature; Hubble constant

Online: 2 April 2024 (15:44:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0211.v1

Calibration Error in 21-cm Experiments Global Spectrum Experiment

Shijie Sun, Eloy de Lera Acedo, Fengquan Wu, Bin Yue, Jiacong Zhu, Xuelei Chen

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmic Dawn; 21 cm Cosmology; Instrument Calibration; Systematic Errors

Online: 2 April 2024 (12:35:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0122.v1

Landau Tidal Damping and Major-Body Clustering in Solar and Extrasolar Subsystems

Dimitris M. Christodoulou, Demosthenes Kazanas

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dynamical evolution of planets and satellites; Extrasolar planets; Gravitation; Landau damping; Mean tidal field

Online: 2 April 2024 (09:18:05 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202403.1808.v1

Calculating the Mass of Objects That Are Transitive from Giant Planets to Brown Dwarfs Using a New Formula for the Gravitational Potential

Askar Abdukadyrov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Giant planets; brown dwarfs; gravitational potential; gravitational constant

Online: 29 March 2024 (09:20:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1816.v1

Phantom Scalar Field Cosmologies Constrained by Early Cosmic Measurements

José Antonio Nájera, Celia Escamilla-Rivera

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy; precision cosmology; cosmological parameters; Hubble tension

Online: 29 March 2024 (08:35:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1673.v1

Experiments Conducted to Date to Verify the Relativistic Gravitational Time Dilation Have Limited Scientific Significance

Reiner Georg Ziefle

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: General relativity (GR); gravitational time dilation; gravitational red shift

Online: 28 March 2024 (04:32:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1663.v1

The Photon Energy Density Parameter Ωγ of the Universe Exactly Derived

Espen Haug

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Photon energy density parameter; Friedmann equation; critical density; Thermodynamical Friedmann equation

Online: 27 March 2024 (14:17:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1651.v1

Anisotropic Generalization of the ΛCDM Universe Modelwith Application to the Hubble Tension

Øyvind G. Grøn

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: universe model; exact solution; Hubble tension; cosmoly

Online: 27 March 2024 (08:18:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202105.0197.v9

Space Theory

S. Chen

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space; gravitation

Online: 26 March 2024 (14:12:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1241.v2

Friedmann Type Equations in Thermodynamic Form Lead to Much Tighter Constraints on the Critical Density of the Universe

Espen Haug, Eugene Tatum

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Friedmann equations, FLRW, Universal critical density, Cosmological con- stant, Haug-Tatum model, Extremal solution, Haug-Spavieri solution, Flat space cosmology

Online: 26 March 2024 (10:51:27 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1475.v1

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

Artem Yu. Shikhovtsev ---, Evgeniy A. Kopylov, Sergey A. Potanin, Pavel G. Kovadlo, Chun Qing

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: optical turbulence; profiles; Fried parameter; the air refractive index structure constant Cn2.

Online: 25 March 2024 (11:25:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1228.v1

The κ-Model under Test of the Sparc Database

Gianni Pascoli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: SPARC database; galaxy; MOND; Newtonian Fractional-Dimension Gravity; Refracted Gravity; κ -model; dark matter

Online: 21 March 2024 (01:54:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1241.v1

Friedmann Type Equations in Thermodynamical Form Lead to Much Tighter Constraints on the Energy Density of the Universe

Espen Haug

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Friedmann equations, FLRW, energy density universe, extremal solutions, Haug-Spavieri solution.

Online: 20 March 2024 (16:58:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0301.v18

Reexamining the Schwarzschild Metric: Implications for Black Hole Interiors and Cosmology

Christopher Laforet

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmology; black holes; dark energy; Schwarzschild metric

Online: 19 March 2024 (12:58:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1049.v1

Instantaneous Relativistic Precession of Mercury

Javier Bootello

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Mercury; angular precession; Doppler tracking

Online: 18 March 2024 (15:15:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0771.v1

Quantum Entanglement Asymmetry and the Cosmic Matter-Antimatter Imbalance: A Theoretical and Observational Analysis

Florian Neukart

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Quantum Entanglement Asymmetry; Matter-Antimatter Imbalance; Cosmic Microwave Background Anisotropies; Friedmann Equations; Cosmological Evolution

Online: 13 March 2024 (09:52:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0478.v2

Magnetic Black Hole Thermodynamics in an Extended Phase Space with Nonlinear Electrodynamics

S. I. Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Einstein's gravity; black holes; thermodynamics; Smarr relation; Gibbs free energy; Anti-de Sitter spacetime

Online: 12 March 2024 (08:10:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202105.0197.v8

Space Theory

S. Chen

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space; gravitation

Online: 7 March 2024 (08:09:22 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.1751.v3

Firewalls, Hawking (Tolman) Radiation, and a Tentative Resolution of the Firewall-Mass Problem

Jack Denur

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Schwarzschild black holes; Schwarzschild non-black holes; Ruler distance; Planck units; Hawking radiation; Tolman radiation; Gravitational frequency shift; Firewall mass; Negative gravitational mass-energy; Birkhoff's Theorem; Thermodynamic equilibrium; First Law of Thermodynamics; Second Law of Thermodynamics

Online: 5 March 2024 (10:56:30 CET)

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Preprint REVIEW | doi:10.20944/preprints202403.0236.v1

Review on the Minimally Extended Varying Speed of Light Model

Seokcheon Lee

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: varying speed of light models; standard cosmological model; Robertson-Walker metric; physical constants; Hubble parameter

Online: 5 March 2024 (06:31:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0117.v1

Emergence of Time from Primordial Space and Expansion of Space with Time

Eckhard Rebhan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space-time; generic space expansion; emergence of time; dark energy; quantum gravity; Wheeler-de Witt-equation; volume quantisation; friction by information transfer; information quantum

Online: 4 March 2024 (05:58:41 CET)

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A model of space-time is presented, whose origin is set before the appearance of any universe. It uses concepts of previous work, a central one being that the information about the laws of nature is stored locally everywhere in space such that all physical processes obey them. Since information storage is bound to matter or energy, space is assumed to consist of dark energy (DE), which thus assumes an importance far beyond its function as a stopgap for an energy deficit in our universe (U). The primordial state (PS) is a timeless and relatively large space of 3 dimensions described by a Wheeler DeWitt (WDW) equation, whose solution is interpreted as an arrangement of very many space quanta and possesses all the characteristics of the time-honored concept of the unmoved mover. The comparison of WDW solutions belonging to different mass densities of the DE favors one in which the space quanta are mini black holes, and allows the space quanta to be imagined as mass points that are kept at a distance compatible with the quantum volume by the Pauli principle or something equivalent. Triggered by an increase in probability, the PS is followed by a time-dependent state of space expansion (ES). The concomitant emergence of time occurs in a lightning huge crash, consuming almost all DE of the PS. The subsequent expansion proceeds in quantum leaps, whose huge size emerges from a WDW equation novelly derived from the time-dependent classical expansion solution, and is also used as size of the PS. Information is assumed to be geometrically stored in arrangements of space quanta similar to how genetic information is stored in DNA molecules. During space expansion information must be transferred from already existing "information quanta" to new ones. This requires time, slows down the expansion and is taken into account by a friction term in the cosmological momentum equation. Sinc e the Friedmann-Lemaître (FL) equation remains fully valid, the model can exclusively be based on recognized equations, so that the assumptions used to build it can be understood as interpretations.

Preprint ARTICLE | doi:10.20944/preprints202402.1645.v1

Time Expansion Wave Theory—A New Approach to Understanding the Universe and Its Expansion

G K Jarvis

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: universe expansion; gravity; wave-particle-duality; singularities; electromagnetism; quantum entanglement; fine structure constant; 137

Online: 28 February 2024 (14:43:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1598.v1

Cosmography of the Minimally Extended Varying Speed of Light Model

Seokcheon Lee

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmography; varying speed of light models; standard cosmological model; Hubble parameter

Online: 28 February 2024 (10:35:56 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1621.v1

FLRW Transit Cosmological Model in F (R,T) Gravity

Vijay Singh, Siwaphiwe Jokweni, Aroonkumar Beesham

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: f(R,T) gravity; dark energy; scale factor.

Online: 28 February 2024 (09:31:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1292.v1

Non-thermal Solar-Wind Electron Velocity Distribution Function

Peter H. Yoon, Rodrigo A. López, Chadi S. Salem, John W. Bonnell, Sunjung Kim

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Kappa distribution; solar wind electrons; whistler-mode waves; turbulence; thermal fluctuations; electromagnetic; electrostatic; plasma; kinetic

Online: 22 February 2024 (09:51:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1088.v1

Retarded Gravity in Disk Galaxies

Yuval Glas, Tomer Zimmerman, Asher Yahalom

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark Matter; MOND; Retardation; General Relativity

Online: 20 February 2024 (11:28:30 CET)

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Preprint REVIEW | doi:10.20944/preprints202402.1068.v1

Impact of AGN feedback on the dynamics of gas; A Review across Diverse Environments

Mojtaba Raouf, Mohammad Hossein Purabbas, Fatemeh Fazel Hesar

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxy groups, blackhole activity, AGN feedback, kinematic misalignment, mergers, group dynamics, radio luminosity, stellar populations, galaxy formation

Online: 19 February 2024 (14:54:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202004.0468.v2

Inflation of Universe by nonlinear electrodynamics

Sergey Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Universe inflation; Einstein's gravity; nonlinear electrodynamics; e-folding number; classical stability; causality

Online: 19 February 2024 (14:51:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.1751.v2

Firewalls, Hawking (Tolman) Radiation, and a Tentative Resolution of the Firewall-Mass Problem

Jack Denur

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Schwarzschild black holes; Ruler distance; Planck units; Hawking radiation; Tolman radiation; Gravitational frequency shift; Firewall mass; Negative gravitational mass-energy; Birkhoff’ s Theorem; Thermodynamic equilibrium; First Law of Thermodynamics; Second Law of Thermodynamics

Online: 19 February 2024 (14:44:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0712.v1

In an Eggshell: Baryonic Black Hole Universe with CMB Cycle for Gravity and Λ

Matthew R. Edwards

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmic microwave background; Hubble redshift; black hole; black hole universe; gravastar; optical gravity

Online: 12 February 2024 (16:26:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0683.v1

The Post–Quasi–Static Approximation: An Analytical Approach to Gravitational Collapse

Luis Herrera, Alicia Di Prisco, Justo Ospino

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Relativistic fluid; gravitational collapse; dissipative systems

Online: 12 February 2024 (13:26:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0564.v1

Modified Power Law Cosmology: Theoretical Scenarios and Observational Constraints

Lokesh Kumar Sharma, Suresh Parekh, Kalyani C.K. Mehta, Maxim Yu. Khlopov, Saibal Ray, Anil Kumar Yadav

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: MCMC; cosmological parameters; Power Law; Observational constraints; Om Diagnostics; cosmography

Online: 9 February 2024 (13:24:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0478.v1

Magnetic Black Hole Thermodynamics in an Extended Phase Space with Nonlinear Electrodynamics

Sergey Il'ich Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Einstein's gravity; black holes; thermodynamics; Smarr relation; Gibbs free energy; Anti-de Sitter spacetime

Online: 8 February 2024 (10:10:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0442.v1

Search for Extreme Mass Ratio Inspirals using Particle Swarm Optimization and Reduced Dimensionality Likelihoods

Xiao-Bo Zou, Soumya D. Mohanty, Hong-Gang Luo, Yu-Xiao Liu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: LISA; Gravitational Waves; EMRI; PSO; Likelihood Ratio

Online: 7 February 2024 (11:51:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0371.v1

Is Entropy a Force of Nature?

Martin Johnson

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy
cosmic background radiation
dark ages
large-scale structure of the Universe

Online: 7 February 2024 (03:37:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0664.v3

Investigation of the Casimir Effect in the Hubble Universe and Black Holes

Espen Haug, Stephane Wojnow

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble sphere, Casimir effect, luminosity, radiation pressure, quantum cosmology, vacuum energy.

Online: 2 February 2024 (10:33:27 CET)

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Preprint REVIEW | doi:10.20944/preprints202402.0041.v1

Refracted Gravity Solutions from Small to Large Scales

Valentina Cesare

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: modified gravity; dark matter; galaxy dynamics; acceleration scale; scaling relations; galaxy clusters; cosmology

Online: 1 February 2024 (12:55:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.2051.v1

Can Black Holes or Other Relativistic Space Objects Be a Source of Dark Energy?

Serge Parnovsky

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: general relativity; cosmology; black hole; dark energy; naked singularity; gravastar

Online: 29 January 2024 (15:44:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.2215.v2

Relativity Cosmology

Jeongin Choi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmology; Cosmological parameters; Hubble tension

Online: 29 January 2024 (13:09:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.0873.v4

On the Interpretation of Cosmic Acceleration

Enrique Gaztanaga

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

Online: 29 January 2024 (04:48:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1084.v2

Quintessential Water from Cosmic Dust: A Possible Origin of Dark Matter, Dark Energy, and Life in the Universe

Keith Huber Johnson

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark matter; dark energy; origin of life; cosmic dust; quintessential water

Online: 26 January 2024 (07:23:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1586.v1

Swarm intelligence methods for Extreme Mass Ratio Inspiral search: First application of Particle Swarm Optimization

Xiao-Bo Zou, Soumya D. Mohanty, Honggang Luo, Yu-Xiao Liu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: LISA; Gravitational Waves; EMRI; PSO; Likelihood Ratio

Online: 22 January 2024 (10:47:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1337.v1

Flat Horizon D-Dimensional Black Holes in the Cubic Form of f(Q) Theory

Gamal Gergess Lamee Nashed

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: f(Q); black holes; stability

Online: 17 January 2024 (14:54:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1126.v1

MOND, MONG and the Oort cloud

C Sivaram, OV Kiren, Louise Rebecca, Arun Kenath

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Oort cloud; Modified Newtonian Dynamics; Modified Newtonian Gravity

Online: 15 January 2024 (11:51:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0664.v2

Investigation of the Casimir Effect in the Hubble Universe and Black Holes

Espen Haug, Stephane Wojnow

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble sphere, Casimir effect, luminosity, radiation pressure, quantum cosmology, vacuum energy.

Online: 13 January 2024 (16:43:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0964.v1

Simulation of Protoplanetary Disk Evolution Using FARGO3D

Fuyang Feng, Jonathan H. Jiang, Zong-Hong Zhu, Giovanni Covone

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Protoplanetary disk; FARGO3D; Exoplanet

Online: 12 January 2024 (10:41:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0909.v1

Is Asteroid 33 Polyhymnia a Dark Matter (DM) Degenerate Object?

OV Kiren, C Sivaram, Arun Kenath

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: 33 Polyhymnia; dark matter; superheavy elements; compact object

Online: 11 January 2024 (11:16:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0720.v1

A Unified Relativistic Theory of Electromagnetism and Gravity

Yaakov Friedman, Tzvi Scarr

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Unification; Relativity of spacetime; Extended Principle of Inertia; Geometrization of spacetime; Local scaling function of curved spacetime; Four-potential of a field; Tensor of a field; Relativistic dynamics; Superposition in gravitation

Online: 9 January 2024 (12:21:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0664.v1

Investigation of the Casimir Effect in the Hubble Universe and Black Holes

Espen Haug, Stephane Wojnow

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble sphere, Casimir effect, luminosity, radiation pressure, quantum cosmology, vacuum energy.

Online: 9 January 2024 (10:14:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.0873.v3

On the Interpretation of Cosmic Acceleration

Enrique Gaztanaga

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

Online: 8 January 2024 (06:37:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.1002.v4

Dark Energy and Dark Matter from Extra Dimensional Symmetry as Different Manifestations of Vacuum Energy

Kabir Umar

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy; dark matter; extra dimension; gravity; neutrino; vacuum energy

Online: 5 January 2024 (15:40:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0173.v2

The Blackbody CMB Temperature, Luminosity, and Their Relation to Black Hole Cosmology, Compared to Bekenstein-Hawking Luminosity

Espen Haug, Stephane Wojnow

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: CMB temperature luminosity; black hole luminosity; Hawking temperature

Online: 5 January 2024 (07:00:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0302.v1

Radio Emission and Observations from the Solar Transition Region

Baolin Tan, Jing Huang, Yin Zhang, Yuanyong Deng, Linjie Chen, Fei Liu, Jin Fan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar transition region; radio emission; magnetic field; gradient

Online: 4 January 2024 (03:11:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0173.v1

The Blackbody CMB Temperature, Luminosity, and Their Relation to Black Hole Cosmology, Compared to Bekenstein-Hawking Luminosity

Espen Haug, Stephane Wojnow

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: CMB temperature luminosity; black hole luminosity; Hawking temperature

Online: 3 January 2024 (09:28:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0174.v1

A Critical Examination of the Standard Cosmological Model: Toward a Modified Framework for Explaining Cosmic Structure Formation and Evolution

Robert Nyagisera, Dismas Simiyu Wamalwa, Benard Rapando, Celine Awino, Maxwell Mageto

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Modified redshift; Friedmann; Number density; Light intensity; Galaxies

Online: 3 January 2024 (09:03:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0144.v1

Fundamental Nature and Evolution of Dynamic Dark Energy

Florian Neukart

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: quintessence models; cosmic acceleration; dark energy evolution; scalar fields; cosmological constant

Online: 3 January 2024 (06:56:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0137.v1

Observational Constraints and Future of the Universe with Dynamic Dark Energy

Florian Neukart

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble tension; Cosmic Microwave Background; Large-scale structures; Dark energy constraints; Future cosmological observations

Online: 3 January 2024 (04:20:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0136.v1

The Collapse of a Neutrino Star Singularity: The Mechanism of the Big Bang?

Jian-Bin Bao, Nicholas Bao

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmology; cosmic background radiation — early Universe

Online: 3 January 2024 (04:18:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0077.v1

Interactions and Implications of Dynamic Dark Energy in Cosmology

Florian Neukart

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark matter interaction; baryonic matter; cosmological perturbations; supergravity potentials; cosmic structure formation

Online: 3 January 2024 (02:33:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.2238.v1

Qualitative Properties of the Solutions to the Lane-Emden Equation in the Cylindrical Setup

Arsen Palestini, Simone Recchi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Lane-Emden equation; polytrope; ODEs

Online: 29 December 2023 (08:15:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1759.v1

Constraints on Phase Transitions in Neutron Star Matter

Len Brandes, Wolfram Weise

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dense baryonic matter; neutron stars; phase transitions

Online: 25 December 2023 (09:55:56 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1782.v1

The Hubble Sphere, Gravitational Fluid, Fluid Mechanics and the Planck Scale

Espen Haug

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hydrostatic pressure; Hubble sphere; black hole; Planck length; super fluid

Online: 25 December 2023 (09:39:29 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1564.v1

Background gravitational waves as signature of the accelerated cosmic expansion

Cláudio Nassif Cruz, Antônio Carlos Amaro de Faria Jr.

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: gravitational waves, dark energy, cosmological constant, Planck length

Online: 20 December 2023 (14:05:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1489.v1

The CMB Temperature as Geometric Mean Gravitational Potential Energy and Also Its Connection to the Electrostatic Force

Espen Haug

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: CMB temperature; Gravitational potential energy; geometric mean

Online: 20 December 2023 (10:50:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1365.v1

Quantum correction to black hole accretion

Vyacheslav Ivanovich Dokuchaev

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: gravitation; astrophysics; black holes

Online: 19 December 2023 (09:37:24 CET)

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Preprint ARTICLE | doi:10.20944/preprints202207.0121.v6

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

Amrit Ladhani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: big bang and big crunch; cosmology; dark energy; dark matter; gravitational force; the cyclic universe

Online: 18 December 2023 (06:27:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202105.0488.v10

The Solar System: Nature and Mechanics

Mario Ljubičić

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

Online: 18 December 2023 (02:48:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1161.v1

Enhancement of Database NORAD-Atomic-Data for Atomic Processes in Plasma

Sultana N. Nahar, Guillermo Hinojosa-Aquirre

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Atomic data; transition probabilities; photoionization cross sections; electron-ion recombination cross sections and rate coefficients; lifetimes; electron-impact excitation; Line ratios; third generation synchrotron radiation

Online: 15 December 2023 (12:09:55 CET)

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We report recent enhancements of the online atomic database at the Ohio State University, NORAD-Atomic-Data, that provides various parameters for radiative and collisional atomic processes dominant in astrophysical plasma. NORAD stands for Nahar Osu RADiative. The database belongs to the data sources, especially for the latest works, of the international collaborations of the Opacity Project and the Iron Project. The contents of the database are calculated values for energies, oscillator strengths, radiative decay rates, lifetimes, cross sections for photoionization, electron-ion recombination cross sections and recombination rate coefficients. We have recently expanded NORAD-Atomic-Data with several enhancements over those reported earlier. They are as follows. i) We continue to add energy levels, transition parameters, cross sections for atoms and ions with their publications. ii) Recently added radiative atomic data contains significant amount of transition data for photo-absorption spectral features corresponding to x-ray resonance fluorescence effect, prominent wavelength regions of bio-signature elements, such as phosphorus ions, and emission bumps of heavy elements, such as of lanthanides, that may be created in a kilonova event. We are including iii) collisional data for electron-impact-excitation, iv) experimental data for energies and oscillator strengths for line formation, v) experimental cross sections for photoionization that can be applied for benchmarking and other applications, and vi) introduction of a web-based interactive feature to calculate spectral line ratios at various plasma temperature and density diagnostics, starting with our recently published data for P II. We presented summary description of theoretical backgrounds for the computed data in the earlier paper. With introduction of experimental results, we present summary description of measurement of high resolution photoionization cross sections at Advanced Light Source of LBNL synchrotron set-up and briefly discuss other set-ups. These additions should make NORAD-Atomic-Data more versatile for various applications. For brevity, we provide information on the extensions and avoid repetition of data description of the original paper.

Preprint REVIEW | doi:10.20944/preprints202312.1182.v1

Dirac’s Large Number Hypothesis: An Ongoing Quest for Correlations Between the Infinitesimal and the Infinite

Jonathan H. Jiang, Ethan Liu, Yanbei Chen

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: large number hypothesis; infinitesimal; infinite; gravitational constant; continuous; mass creation; ;
anthropic principle; variability of constants; cosmological parameters; theoretical physics; universe models; ;
Einstein's theory of general relativity; cosmic time; quantum physics

Online: 15 December 2023 (11:17:31 CET)

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Preprint REVIEW | doi:10.20944/preprints202312.1070.v1

Highlights of the Magic Florian Goebel Telescopes in the Study of Active Galactic Nuclei

Marina Manganaro, Dijana Dominis Prester

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: γ -ray astrophysics; Active galactic nuclei; very-high-energy gamma rays; non-thermal; high energy astrophysics

Online: 14 December 2023 (08:32:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1016.v1

A Dark Energy Paradigm: I. A Solution to the Cosmological Constant Problem to Predict Lepton Masses as Evidence

Yong-Jae Moon, Wook Koh

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmological constant; lepton mass; dark energy paradigm; unified dark sector; Planck's dimensional analysis

Online: 14 December 2023 (04:32:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0886.v1

Re-examination of Penrose’s Space-Time Singularity and the Origin of Protons in Astrophysical Jets

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space-time singularity, astrophysical jets, energy density of superfluid space

Online: 12 December 2023 (11:21:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0775.v1

Two Proposed Experiments for the Tachyon-Neutrino Theory of Dark Matter

Charles Schwartz

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: neutrinos; tachyons; dark matter; detection of Cosmic Neutrino Background

Online: 12 December 2023 (05:06:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0732.v1

Microwave Receiving System Based on Cryogenic Sensors for the Optical Big Telescope Alt-Azimuth

Yurii Balega, Grigory Bubnov, Artem Chekushkin, Victor Dubrovich, Valerian Edelman, Aleksandra Gunbina, Sergey Kapustin, Tatyana Khabarova, Dmitrii Kukushkin, Igor Lapkin, Maria Mansfeld, Andrei Maruhno, Vladimir Parshin, Aleksey Raevskiy, Vladislav Stolyarov, Mikhail Tarasov, Gennady Valyavin, Vyacheslav Vdovin, Grigory Yakopov, Renat Yusupov, Petr Zemlyanukha, Igor Zinchenko

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: radioastronomy, superconducting sensors, SINIS detectors, optical telescope, BTA SAO RAS

Online: 11 December 2023 (15:57:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0075.v1

Towards a European Facility for Ground-Based Radar Observations of Near-Earth Objects

Giuseppe Pupillo, Simona Righini, Roberto Orosei, Claudio Bortolotti, Giuseppe Maccaferri, Mauro Roma, Marco Mastrogiuseppe, Tonino Pisanu, Luca Schirru, Stefano Cicalo', Antonio Tripodo, Jorma Harju, Antti Penttilä, Anne K. Virkki, Uwe Bach, Alexander Kraus, Alessio Margheri, Riccardo Ghiani, Maria N. Iacolina, Giuseppe Valente, Detlef Koschny, Richard Moissl, Gunther Sessler

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: radar; near-Earth Objects; asteroids; planetary defense

Online: 4 December 2023 (08:27:04 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1978.v1

Entropy of Black Holes and an Oscillating Universe

Nick Gorkavyi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: entropy; black holes; oscillating Universe

Online: 30 November 2023 (11:35:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1924.v1

Reconstructing Modified and Alternative Theories of Gravity

Dalia Saha, Manas Chakrabortty, Abhik Kumar Sanyal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Modifeied and alternative theories of gravity; Reconstruction; Inflation

Online: 30 November 2023 (10:34:30 CET)

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Preprint REVIEW | doi:10.20944/preprints202311.1815.v1

The Scale Invariant Vacuum Paradigm: Main Results and Current Progress Review (Part II)

Vesselin G. Gueorguiev, Andre Maeder

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmology: theory; dark matter; dark energy; inflation; galaxies: formation; rotation; weyl integrable geometry; dirac co-calculus

Online: 30 November 2023 (02:00:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1854.v1

SISA: The First Extreme-Ultraviolet Solar Integral Field Spectrograph Using Slicers

Ariadna Calcines Rosario, Hamish Andrew Sinclair Reid, Sarah Matthews, Frédéric Auchère, Alain Jody Corso, Giulio Del Zanna, Jaroslav Dudik, Samuel Gissot, Laura Hayes, Graham Stewart Kerr, Christian Kintziger, Sophie Musset, Vanessa Polito, Daniel F. Ryan, David Orozco Suárez

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: EUV Spectroscopy; solar IFS; EUV slicers; image slicers; solar space mission; particle acceleration

Online: 29 November 2023 (10:56:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1087.v1

Results and Perspectives of Timepix Detectors in Space - from Radiation Monitoring in Low Earth Orbit to Astroparticle Physics

Benedikt Bergmann, Stefan Gohl, Declan Garvey, Jindrich Jelinek, Petr Smolyanskiy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Space weather; scatter polarimeter; hybrid pixel detectors; Timepix; dE/dX spectrometer; low earth orbit; magnetic spectrometer; galactic cosmic rays; space instrumentation

Online: 17 November 2023 (05:15:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1084.v1

Quintessential Water from Cosmic Dust: A Possible Origin of Dark Matter, Dark Energy, and Life in the Universe

Keith Johnson

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark Matter; Dark Energy; Life; Cosmic Dust; Water Nanoclusters

Online: 16 November 2023 (11:37:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202101.0017.v3

Oscillating Universe with a Quantized Black Hole

Sascha Kulas

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Oscillating universe; big bang; big bounce; Hubble constant; dark energy; dark matter; inflation; vacuum energy density; Casimir effect

Online: 15 November 2023 (09:05:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0823.v1

Hubble Diagram Test of SN1a Supernovae and High Redshift Gamma Ray Bursts: Data Analysis of the Log(z)/µ, ln(z+1)/T(d) and Linear Photon Flight Time T/(z+1) Scales. – Comparison of Observational Data with Model Calculations.

Laszlo Marosi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; distances and redshifts - galaxies; high-redshift - stars; gamma ray burst; general - cosmology; cosmological parameters

Online: 13 November 2023 (12:18:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0667.v1

Charge Resolution Study on AMS-02 Silicon Layer-0 Prototype

Alessio Ubaldi, Maura Graziani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: AMS-02 Layer 0 upgrade; Silicon micro-strips detector; nuclei; charge resolution; ADC

Online: 10 November 2023 (08:09:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0499.v1

Detection of Solar Neutrons and Solar Neutron Decay Protons

Yasushi Muraki, Tatsumi Koi, Yutaka Matsubara, Satoshi Masuda, Pedro Miranda, Shoko Miyake, Tsuguya Naito, Ernesto Ortiz Fragoso, Akitoshi Oshima, Takashi Sako, Shoichi Shibata, Hisanori Takamaru, Munetoshi Tokumaru, Jose Franco Valdes-Galicia, Kyoko Watanabe

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar flare; impulsive flare; gradual flare; solar comic-rays; solar energetic particles; particle acceleration; solar neutrons

Online: 8 November 2023 (06:44:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0370.v1

A Statistical Approach to Neutron Star Crust-Core Transition Density and Pressure

Ilona Bednarek, Wiesław Olchawa, Jan Sładkowski, Jacek Syska

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: neutron star; symmetry energy; nuclear matter modeling

Online: 7 November 2023 (11:39:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0416.v1

Study of the Nearby Source Based on Cosmic Ray Nuclear Spectra and Anisotropy

Aifeng Li, Fangheng Zhang, Wei Liu, Zhaodong Lv, Dongyue Liang, Xiangqu Chen

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galatic cosmic rays; nearby source; cosmic ray anisotropy; cosmic ray spectra

Online: 7 November 2023 (08:28:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0208.v1

Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24

Ali Kilcik, Atila Ozguc, Jean-Pierre Rozelot

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar cycles; Solar flares; Geomagnetic activity indices; Cosmic rays; Period analysis

Online: 3 November 2023 (11:23:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0134.v1

How Long Can the Spiral Arms of Disc Galaxies Be Optically Observed?

Hongjun Pan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Spiral arms; spiral pattern rotation; evolution; spiral galaxies

Online: 2 November 2023 (10:34:43 CET)

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Preprint REVIEW | doi:10.20944/preprints202311.0092.v1

The Alignment of Galaxies in Structures – Review

Włodzimierz Godłowski

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: orientation of galaxies; galaxies clusters; morphological types of galaxies

Online: 1 November 2023 (12:17:22 CET)

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