Mock X-Ray Observations of Hot Gas with L-Galaxies Semi-analytic Models of Galaxy Formation  

作　　者：Wenxin Zhong Jian Fu Shiyin Shen Feng Yuan 

机构地区：[1]Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,CAS,Shanghai 200030,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Lab for Astrophysics,Shanghai 200034,China

出　　处：《Research in Astronomy and Astrophysics》2023年第7期37-51,共15页天文和天体物理学研究（英文版）

基　　金：the support from the National SKA Program of China No.2020SKA0110102;the fund for key programs of Shanghai Astronomical Observatory(Grants E195121009 and E297091002);Shanghai Committee of Science and Technology Grant No.19ZR1466700;supported in part by the Natural Science Foundation of China(Grants 12133008,12192220,and 12192223)。

摘　　要：We create mock X-ray observations of hot gas in galaxy clusters with a new extension of the L-Galaxies semianalytic model of galaxy formation,which includes the radial distribution of hot gas in each halo.Based on the model outputs,we first build some mock light cones,then generate mock spectra with the SOXS package and derive the mock images in the light cones.Using the mock data,we simulate mock X-ray spectra for the ROSAT all-sky survey,and compare the mock spectra with the observational results.Then,we consider the design parameters of the HUBS mission and simulate the observation of the halo hot gas for HUBS as an important application of our mock work.We find:(1)our mock data match the observations by current X-ray telescopes.(2)The survey of hot baryons in resolved clusters by HUBS is effective below redshift 0.5,and the observations of the emission lines in point-like sources at z>0.5 by HUBS help us understand the hot baryons in the early universe.(3)By taking advantage of the large simulation box and flexibility in semi-analytic models,our mock X-ray observations provide the opportunity to select targets and observation strategies for forthcoming X-ray facilities.

关 键 词：X-rays:galaxies:clusters galaxies:clusters:intracluster medium galaxies:groups:general galaxies:halos (galaxies:)intergalactic medium 

分 类 号：P15[天文地球—天文学]