Observational constraints in modified Chaplygin gas cosmological model

被引:5
|
作者
Shukla, A. K. [1 ]
Raushan, R. [2 ]
Mandal, S. [3 ]
Chaubey, R. [3 ]
机构
[1] Lovely Profess Univ, Dept Math, Jalandhar, Punjab, India
[2] BMA Coll, Dept Math, Darbhanga, Bihar, India
[3] Banaras Hindu Univ, Inst Sci, Ctr Interdisciplinary Math Sci, Varanasi 221005, India
关键词
Observational constraints; Bianchi type-V universe; Modified Chaplygin gas; Cosmographic parameters; GENERAL-CLASS; VISCOUS-FLUID; DATA RELEASE; DARK ENERGY; ANISOTROPY; CONSTANT; UNIVERSE; LAMBDA; CREATION; SCALES;
D O I
10.1016/j.ascom.2023.100736
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Bianchi type-V cosmological model with modified Chaplygin gas having the equation of state p = & gamma; & rho; - & rho;& alpha; , where C is a positive constant and 0 & LE; & alpha;, & gamma; & LE; 1, has been investigated. To find the C deterministic solution, we have considered power-law and intermediate expansions which predicts the decelerating and accelerating phases of expansion of the Universe. Here, we have also constructed cosmographic parameters like H, j,l, s* and studied their evolution in the background of Bianchi type-V Universe with modified Chaplygin gas. The geometric diagnostics, the state-finder (r, s) in our cosmological model to discriminate from the ?CDM model are studied. We have performed the statistical analysis and obtained best fit values of the parameters using MCMC technique for intermediate model. We have also compared our models with observed Hubble data for both scenarios. We have noted some new and interesting cosmological solutions which is relevant for the model building, including present accelerating phase of the Universe.& COPY; 2023 Elsevier B.V. All rights reserved.
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页数:12
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