Version 1
: Received: 25 July 2023 / Approved: 25 July 2023 / Online: 25 July 2023 (08:34:50 CEST)
How to cite:
Singla, N.; Gupta, M.K.; Singh, M.; Yadav, A.K.; Goswami, G.; Prasad, R. Redshift Drift in the Universe: Theoretical Features and Observational Constraints. Preprints2023, 2023071672. https://doi.org/10.20944/preprints202307.1672.v1
Singla, N.; Gupta, M.K.; Singh, M.; Yadav, A.K.; Goswami, G.; Prasad, R. Redshift Drift in the Universe: Theoretical Features and Observational Constraints. Preprints 2023, 2023071672. https://doi.org/10.20944/preprints202307.1672.v1
Singla, N.; Gupta, M.K.; Singh, M.; Yadav, A.K.; Goswami, G.; Prasad, R. Redshift Drift in the Universe: Theoretical Features and Observational Constraints. Preprints2023, 2023071672. https://doi.org/10.20944/preprints202307.1672.v1
APA Style
Singla, N., Gupta, M.K., Singh, M., Yadav, A.K., Goswami, G., & Prasad, R. (2023). Redshift Drift in the Universe: Theoretical Features and Observational Constraints. Preprints. https://doi.org/10.20944/preprints202307.1672.v1
Chicago/Turabian Style
Singla, N., Gopikant Goswami and Rajendra Prasad. 2023 "Redshift Drift in the Universe: Theoretical Features and Observational Constraints" Preprints. https://doi.org/10.20944/preprints202307.1672.v1
Abstract
In this paper, we investigate an exact Universe which is observational viable and filled with binary mixture of perfect fluid and cosmological constant $\Lambda$. Owning the non-uniform expansion of cosmos, we have considered redshift drift $\dot{z} = -(1+z)H_{0}+H(z)$ and performed statistical test to obtain the best fit value of model parameters of derived Universe with its observed values. Here $H_{0}$ and $z$ denote the present value of Hubble constant and redshift respectively. We estimate the best fit values of Hubble constant and density parameters are $H_{0} = 68.58 \pm 0.84$ km/s/Mpc, $(\Omega_{m})_{0} = 0.26 \pm 0.010$ and $(\Omega_{\Lambda})_{0} = 0.71 \pm 0.025$ by bounding the derived model with latest observational Hubble data (OHD) while with joint Pantheon data and OHD, its values are $H_{0} = 71.93 \pm 0.58$ km/s/Mpc, $(\Omega_{m})_{0} = 0.272 \pm 0.06$ and $(\Omega_{\Lambda})_{0} = 0.74 \pm 0.09$. The analysis of deceleration parameter and jerk parameter show that the Universe in derived model is compatible with $\Lambda$CDM model.
Keywords
FRW space-time; General relativity; Cosmological constant; Redshift drift
Subject
Physical Sciences, Nuclear and High Energy Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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