首页|A New Consistency Test forΛCDM Cosmology Using Galaxy Surveys

A New Consistency Test forΛCDM Cosmology Using Galaxy Surveys

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We propose a new consistency test for the ΛCDM 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 flat ΛCDM 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.

Cosmology(cosmology:) dark energygalaxies:distances and redshifts

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

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National Astronomy Observatories,Chinese Academy of Sciences,Beijing,100101,China

School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China

Institute of Cosmology and Gravitation,University of Portsmouth,Dennis Sciama Building,Portsmouth PO13FX,UK

11925303117201010041189069111890691CMS-CSST-2021-B01

2022

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCDCSCDSCI
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2022.22(6)
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