The periodic universe with varying deceleration parameter of the second degree
Sign Up to like & getrecommendations! Published in 2019 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-019-3625-x
Abstract: In the present paper, we propose a new law for the deceleration parameter of the second degree of the time. Our law tells us about the behavior of the universe. According to our law, the… read more here.
Keywords: deceleration parameter; parameter second; law; second degree ... See more keywords
Cosmological models in Sáez-Ballester theory with bilinear varying deceleration parameter
Sign Up to like & getrecommendations! Published in 2020 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-020-03790-w
Abstract: The basic purpose of this communication, is to investigate the dynamical nature of Bianchi type-I universe with perfect fluid content in Sáez-Ballester (SB) theory (Phys. Lett. A 113:467–470, 1986 ). We got the solution of… read more here.
Keywords: deceleration parameter; ballester theory; time; varying deceleration ... See more keywords
Tsallis holographic dark energy in FRW universe with time varying deceleration parameter
Sign Up to like & getrecommendations! Published in 2019 at "New Astronomy"
DOI: 10.1016/j.newast.2019.101281
Abstract: Abstract By considering the time-varying deceleration parameter (DP), we have investigated Tsallis holographic dark energy (THDE), infrared cut-off with the Hubble horizon proposed by Tavayef, et al. (2018) in the framework of Friedmann Robertson Walker universe.… read more here.
Keywords: holographic dark; deceleration parameter; parameter; time varying ... See more keywords
Galaxy rotation curves and the deceleration parameter in weak gravity
Sign Up to like & getrecommendations! Published in 2017 at "Modern Physics Letters A"
DOI: 10.1142/s0217732317300191
Abstract: We present a theory of weak gravity parametrized by a fundamental frequency ω0 = 1 − qH of the cosmological horizon, where H and q denote the Hubble and, respectively, deceleration parameter. It predicts (i) a… read more here.
Keywords: galaxy rotation; deceleration parameter; rotation curves; weak gravity ... See more keywords
FLRW universe in Weyl type f(Q,T) gravity with variable q
Sign Up to like & getrecommendations! Published in 2024 at "Modern Physics Letters A"
DOI: 10.1142/s0217732324500056
Abstract: In this paper, we study an isotropic and homogeneous Friedmann–Lemaitre–Robertson–Walker cosmological model in Weyl type [Formula: see text] gravity with a dynamic deceleration parameter. The solution of the field equations is found using a variable… read more here.
Keywords: see text; model; formula see; deceleration parameter ... See more keywords
Exploring the Bianchi-IX universe within Brans–Dicke theory and a deceleration parameter
Sign Up to like & getrecommendations! Published in 2024 at "Modern Physics Letters A"
DOI: 10.1142/s0217732324501694
Abstract: In this paper, we have presented the cosmological model in Brans–Dicke theory (BDT) of gravity for a Bianchi type-IX spacetime. We obtained the exact solutions of the field equations by applying the new form of… read more here.
Keywords: dicke theory; brans dicke; exploring bianchi; deceleration parameter ... See more keywords
A comparative analysis in f(R,T) and Brans–Dicke theories with novel deceleration parameter
Sign Up to like & getrecommendations! Published in 2025 at "Modern Physics Letters A"
DOI: 10.1142/s0217732325501470
Abstract: This study conducts a comprehensive comparative analysis of two influential cosmological theories, namely Brans–Dicke and [Formula: see text] theory of gravity, within the context of a new form of the deceleration parameter, i.e. Fractional Quadratic… read more here.
Keywords: brans dicke; deceleration parameter; comparative analysis; deceleration ... See more keywords
Bulk Viscous Cosmological Model with Varying Deceleration Parameter in Modified Gravity
Sign Up to like & getrecommendations! Published in 2025 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887826500878
Abstract: This work investigates a spatially homogeneous and anisotropic Bianchi type-I universe within the framework of [Formula: see text] gravity, where R is the Ricci scalar and T represents the trace of the energy-momentum tensor, specifically… read more here.
Keywords: bulk viscous; gravity; model; deceleration parameter ... See more keywords