Cosmological test of dark energy parametrizations within the framework of Horava-Lifshitz gravity via baryon acoustic oscillation  

作　　者：Himanshu Chaudhary Shibesh Kumar Jas Pacif Ujjal Debnath Farook Rahaman G.Mustafa 

机构地区：[1]Pacif Institute of Cosmology and Selfology(PICS),Sagara,Sambalpur 768224,Odisha,India [2]Department of Applied Mathematics,Delhi Technological University,Delhi-110042,India [3]Department of Mathematics,Shyamlal College,University of Delhi,Delhi-110032,India [4]Department of Mathematics,Indian Institute of Engineering Science and Technology,Shibpur,Howrah-711103,India [5]Department of Mathematics,Jadavpur University,Kolkata-700032,India [6]Department of Physics,Zhejiang Normal University,Jinhua 321004,China

出　　处：《Chinese Physics C》2024年第11期203-219,共17页中国物理C（英文版）

摘　　要：We conduct an investigation to explore late-time cosmic acceleration through various dark energy parametrizations(Wettrich,Efstathiou,and Ma-Zhang)within the Horava-Lifshitz gravity framework.As an alternative to general relativity,this theory introduces anisotropic scaling at ultraviolet scales.Our primary objective is to constrain the key cosmic parameters and baryon acoustic oscillation(BAO)scale,specifically the sound horizon(rd),by utilizing 24 uncorrelated measurements of BAOs derived from recent galaxy surveys spanning a redshift range from z=0.106 to z=2.33.Additionally,we integrate the most recent Hubble constant measurement by Riess in 2022(denoted as R22)as an extra prior.For the parametrizations of Wettrich,Efstathiou,and Ma-Zhang,our analysis of BAO data yields sound horizon results of r_(d)=148.1560±2.7688 Mpc,r_(d)=148.6168±10.2469 Mpc,and r_(d)=147.9737±10.6096 Mpc,respectively.Incorporating the R22 prior into the BAO dataset results in r_(d)=139.5806±3.8522 Mpc,r_(d)=139.728025±2.7858 Mpc,and r_(d)=139.6001±2.7441 Mpc.These outcomes highlight a distinct inconsistency between early and late observational measurements,analogous to the H_(0) tension.A notable observation is that,when we do not include the R22 prior,the outcomes for rd tend to be in agreement with Planck and SDSS results.Following this,we conducted a cosmography test and comparative study of each parametrization within the Lambda Cold Dark Matter paradigm.Our diagnostic analyses demonstrate that all models fit seamlessly within the phantom region.All dark energy parametrizations predict an equation of state parameter close ω=-1,indicating a behavior similar to that of a cosmological constant.The statistical analysis indicates that neither of the two models can be ruled out based on the latest observational measurements.

关 键 词：dark energy parametrizations Horava-Lifshitz gravity baryon acoustic oscillation 

分 类 号：P159[天文地球—天文学]