Zobrazeno 1 - 10
of 709
pro vyhledávání: '"Goswami, G."'
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) = \bigg( 1+\frac{z(\alpha+(1+z)^{\beta})}{2
Externí odkaz:
http://arxiv.org/abs/2409.18160
We propose to develop a cosmological model of the universe based on Weyl type $ f(Q) $ gravity which shows the transition from decelerating in the past to acceleration at present by considering a particular functional form of $ f(Q) $ gravity as $ f(
Externí odkaz:
http://arxiv.org/abs/2309.01233
We have probed a cosmological model in $f(R)$-gravity, which is a cubic equation in scalar curvature $R$. The terms arise due to nonlinear $f(R)$ function are treated as energy due to curvature inspired geometry. As a result, we find accelerating exp
Externí odkaz:
http://arxiv.org/abs/2204.07604
Publikováno v:
Annals of Physics 443 (2022) 168958
We investigate a flat FLRW-model in $f(R,T)$-gravity, which includes the quadratic variation in scalar curvature $R$ and the linear term of the trace of the stress-energy tensor $T$. In turn, we establish the model has the behaviour of the late time
Externí odkaz:
http://arxiv.org/abs/2204.07599
In this study, we have demonstrated the expansion history of an axially symmetric Bianchi type-I model of the universe. Our model as of now presents an accelerating universe, which had been in the decelerating phase in the past. Roles of the two cruc
Externí odkaz:
http://arxiv.org/abs/2204.04451
Publikováno v:
Galaxies 11, 57 (2023)
In this paper, we have investigated a scalar field cosmological model of accelerating Universe with the simplest parametrization of equation of state parameter of the scalar field. We used $H(z)$ data, pantheon compilation of SN Ia data and BAO data
Externí odkaz:
http://arxiv.org/abs/2107.05044
Publikováno v:
International Journal of Modern Physics A 36, 2150148 (2021)
In this paper, we have proposed a model of accelerating Universe with binary mixture of bulk viscous fluid and dark energy. and probed the model parameters: present values of Hubble's constant $H_{0}$, Equation of state paper of dark energy $\omega_{
Externí odkaz:
http://arxiv.org/abs/2107.02536
Publikováno v:
Fortschr. Phys. 2021, 69, 2100007
In this paper, we have investigated a bulk viscous anisotropic Universe and constrained its model parameters with recent $H(z)$ and Pantheon compilation data. Using cosmic chronometric technique, we estimate the present value of Hubble's constant as
Externí odkaz:
http://arxiv.org/abs/2103.02439
Publikováno v:
Physics of the Dark Universe 31 (2021) 100738
In this paper we investigate a Bianchi type I transitioning Universe in Brans-Dicke theory. To get an explicit solution of the field equations, we assume scalar field as $\phi = \phi_{0}\left[t^{\alpha}exp(\beta t)\right]^{\delta}$ with $\phi_{0}$, $
Externí odkaz:
http://arxiv.org/abs/2011.09266
Publikováno v:
New Astronomy 78 (2020) 101368
In this paper, we have presented an FLRW universe containing two-fluids (baryonic and dark energy) with a deceleration parameter (DP) having a transition from past decelerating to the present accelerating universe. In this model, dark energy (DE) int
Externí odkaz:
http://arxiv.org/abs/2002.11486