A New Consistency Test forΛCDM Cosmology Using Galaxy Surveys  

作　　者：Jinglan Zheng Gong-Bo Zhao Yuting Wang Xiaoyong Mu Ruiyang Zhao Weibing Zhang Shuo Yuan David Bacon Kazuya Koyama 

机构地区：[1]National Astronomy Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [3]Institute of Cosmology and Gravitation,University of Portsmouth,Dennis Sciama Building,Portsmouth PO13FX,UK

出　　处：《Research in Astronomy and Astrophysics》2022年第6期183-189,共7页天文和天体物理学研究（英文版）

基　　金：supported by the Chinese Scholarship Council;STFC;supported by NSFC grants 11925303,11720101004 and 11890691;supported by NSFC Grant 11890691;by the Youth Innovation Promotion Association CAS;by the Nebula Talents Program of NAOC;supported by the National Key Basic Research and Development Program of China;a grant of CAS Interdisciplinary Innovation Team;the science research grants from the China Manned Space Project with No.CMS-CSST-2021-B01。

摘　　要：We propose a new consistency test for theΛCDM cosmology using baryonic acoustic oscillations(BAO)and redshift space distortion(RSD)measurements from galaxy redshift surveys.Specifically,we determine the peak position of fσ8(z)in redshift z offered by an RSD measurement,and compare it to the one predicted by the BAO observables assuming a flatΛCDM cosmology.We demonstrate this new test using the simulated data for the DESI galaxy survey,and argue that this test complements those using the background observables alone,and is less subject to systematics in the RSD analysis,compared to traditional methods using values of fσ8(z)directly.

关 键 词：Cosmology-(cosmology:)dark energy-galaxies distances and redshifts 

分 类 号：P159[天文地球—天文学]