FLRW cosmology in metric-affine F(R,Q)gravity  

作　　者：Dinesh Chandra Maurya K.Yesmakhanova R.Myrzakulov G.Nugmanova 

机构地区：[1]Centre for Cosmology,Astrophysics and Space Science,GLA University,Mathura-281406,Uttar Pradesh,India [2]Ratbay Myrzakulov Eurasian International Centre for Theoretical Physics,Nur-Sultan,010009,Kazakhstan

出　　处：《Chinese Physics C》2024年第12期158-172,共15页中国物理C（英文版）

基　　金：Supported by the Ministry of Science and Higher Education of the Republic of Kazakhstan(AP14870191)。

摘　　要：We investigated some Friedmann-Lemaître-Robertson-Walker(FLRW)cosmological models in the context of metric-affine F(R,Q)gravity,as proposed in[arXiv:1205.5266v6].Here,R and Q are the curvature and nonmetricity scalars using non-special connections,respectively.We obtained the modified field equations using a flat FLRW metric.We then found a connection between the Hubble constant H_(0),density parameter Ω_(m0),and other model parameters in two different situations involving scalars u and w.Next,we used new observational datasets,such as the cosmic chronometer(CC)Hubble and Pantheon SNe Ia datasets,to determine the optimal model parameter values through a Markov chain Monte Carlo(MCMC)analysis.Using these best-fit values of the model parameters,we discussed the results and behavior of the derived models.Further,we discussed the Akaike information criterion(AIC)and Bayesian information criterion(BIC)for the derived models in the context of the Lambda cold dark matter(ΛCDM).We found that the geometrical sector dark equation of state parameter ω_(de)behaves just like a dark energy candidate.We also found that both models are transit phase models.Model-Ⅰ approaches the ΛCDM model in the late-time universe,whereas Model-Ⅱ approaches quintessence scenarios.

关 键 词：metric-affine F(R Q)gravity FLRW flat universe FLRW cosmology transit phase expansion observational constraints 

分 类 号：P159[天文地球—天文学]