The Study of Helium Variations in Star Clusters Using China Space Station Telescope  

作　　者：Xin Ji Licai Deng Yang Chen Chengyuan Li Chao Liu 

机构地区：[1]Key Laboratory for Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100101,China [3]Department of Astronomy,School of Physics and Astronomy,China-West Normal University,Nanchong 637009,China [4]Anhui University,Hefei 230601,China [5]School of Physics and Astronomy,Sun Yat-sen University,Zhuhai 519082,China

出　　处：《Research in Astronomy and Astrophysics》2023年第7期110-117,共8页天文和天体物理学研究（英文版）

基　　金：supported in part by China Manned Space Project with NO.CMS-CSST-2021-A08;the National Natural Science Foundation of China(NSFC,Grants Nos.12233009,12233013,12073090 and 12003001)。

摘　　要：The China Space Station Telescope(CSST)is a 2 m space-based optical-UV telescope.Its primary goal is to carry out a high-resolution photometric imaging survey of a 17,500 square degree sky area using the on board Survey Camera.With its wide field of view(1.1 square degrees)and a mosaic imager containing 640 million pixels,studying the different populations of stars within star clusters is highly feasible.The aim of this study is to assess the CSST's ability to distinguish between stellar populations with varying helium abundance levels,with the help of Modules for Experiments in Stellar Astrophysics.The results of the CSST's photometry for these different populations are presented by transferring the models into the CSST Survey Camera photometric system.The findings confirm that helium-enriched stellar populations will have unique patterns in the color-magnitude diagrams under the CSST photometric system,compared to normal stellar populations.The CSST,with its filters and wide field of view of the Survey Camera,provides a new avenue for the study of multiple populations in star clusters.

关 键 词：(Galaxy:)globular clusters:general stars:abundances (stars:)Hertzsprung-Russell and C-M diagrams 

分 类 号：P111.2[天文地球—天文学] P148