Power law cosmology in Gauss-Bonnet gravity with pragmatic analysis

IF 10.2 4区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Rita Rani , Shaily , G.K. Goswami , J.K. Singh
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引用次数: 0

Abstract

In this study, we present an approach f(R,G) gravity incorporating power law in G. To study the cosmic evolution of the universe given by the reconstruction of the Hubble parameter given by E(z)=(1+z(α+(1+z)β)2β+1)32β. Subsequently, we use various recent observational datasets of OHD, Pantheon, and BAO to estimate the model parameters H0,α, and β applying the Markov Chain Monte Carlo (MCMC) technique in the emcee package to establish the validity of the model. In our findings, we observe that our model shows consistency with standard ΛCDM, transits from deceleration to acceleration, and enters the quintessence region in late times. The cosmological model satisfies necessary energy constraints, simultaneously violating the strong energy condition (SEC), indicating a repulsive nature and consistent with accelerated expansion. The cosmic evolution of the Hawking temperature and the total entropy for the various observational datasets also show the validity of the model. Thus, our established model demonstrates sufficient potential for explicitly describing cosmological models.
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来源期刊
Journal of High Energy Astrophysics
Journal of High Energy Astrophysics Earth and Planetary Sciences-Space and Planetary Science
CiteScore
9.70
自引率
5.30%
发文量
38
审稿时长
65 days
期刊介绍: The journal welcomes manuscripts on theoretical models, simulations, and observations of highly energetic astrophysical objects both in our Galaxy and beyond. Among those, black holes at all scales, neutron stars, pulsars and their nebula, binaries, novae and supernovae, their remnants, active galaxies, and clusters are just a few examples. The journal will consider research across the whole electromagnetic spectrum, as well as research using various messengers, such as gravitational waves or neutrinos. Effects of high-energy phenomena on cosmology and star-formation, results from dedicated surveys expanding the knowledge of extreme environments, and astrophysical implications of dark matter are also welcomed topics.
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