Cross-correlation Forecast of CSST Spectroscopic Galaxy and MeerKAT Neutral Hydrogen Intensity Mapping Surveys

作     者：Yu-Er Jiang Yan Gong Meng Zhang Qi Xiong Xingchen Zhou Furen Deng Xuelei Chen Yin-Zhe Ma Bin Yue Yu-Er Jiang;Yan Gong;Meng Zhang;Qi Xiong;Xingchen Zhou;Furen Deng;Xuelei Chen;Yin-Zhe Ma;Bin Yue

作者机构：National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space SciencesUniversity of Chinese Academy of Science(UCAS)Beijing 100049China Science Center for China Space Station TelescopeNational Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China NAOC-UKZN Computational Astrophysics Centre(NUCAC)University of KwaZulu-NatalDurban4000South Africa Department of PhysicsCollege of SciencesNortheastern UniversityShenyang 110819China Center for High Energy PhysicsPeking UniversityBeijing 100871China School of Chemistry and PhysicsUniversity of KwaZulu-NatalWestville CampusPrivate Bag X54001Durban 4000South Africa Department of PhysicsStellenbosch UniversityMatieland 7602South Africa 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2023年第23卷第7期

页      面：25-36页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the support of 2020SKA0110402,MOST-2018YFE0120800 National Key R&D Program of China No.2022YFF0503404 the National Natural Science Foundation of China(NSFC,Grant Nos.11822305,11773031 and 11633004) support of the National Natural Science Foundation of China(NSFC,Grant Nos.11473044 and 11973047) the Chinese Academy of Sciences grants QYZDJ-SSW-SLH017,XDB23040100,XDA15020200 supported by the National Research Foundation of South Africa under Grant Nos.150580,120385 and 120378 NIThe CS program“New Insights into Astrophysics and Cosmology with Theoretical Models confronting Observational Data” supported by the science research grants from the China Manned Space Project with NO.CMS-CSST-2021-B01 and CMS-CSST-2021-A01 

主　　题：(cosmology:)large-scale structure of universe (cosmology:)cosmological parameters Cosmology 

摘      要：Cross-correlating the data on neutral hydrogen(HⅠ)21 cm intensity mapping with galaxy surveys is an effective method to extract astrophysical and cosmological *** this work,we investigate the cross-correlation of MeerKAT single-dish mode HⅠintensity mapping and China Space Station Telescope(CSST)spectroscopic galaxy *** simulate a survey area of~300 deg~2 of MeerKAT and CSST surveys at z=0.5 using MultiDark N-body *** PC A algorithm is applied to remove the foregrounds of HⅠintensity mapping,and signal compensation is considered to solve the signal loss problem in HⅠ-galaxy cross power spectrum caused by the foreground removal *** find that from CSST galaxy auto and MeerKAT-CSST cross power spectra,the constraint accuracy of the parameter productΩ_(HⅠ)b_(HⅠ)r_(HⅠ,g)can reach~1%,which is about one order of magnitude higher than the current *** performing the full MeerKAT HⅠintensity mapping survey with5000 deg~2 survey area,the accuracy can be enhanced to0.3%.This implies that the MeerKAT-CSST cross-correlation can be a powerful tool to probe the cosmic HⅠproperty and the evolution of galaxies and the Universe.