天文学进展2016，Vol.34Issue(1)：111-119,9.DOI:10.3969/j.issn.1000-8349.2016.01.07
kSZ效应的组分分析
Different Gas Contribution to the Kinetic Sunyaev Zel'dovich Effect
苗寒1
作者信息
- 1. 中国科学院 上海天文台 星系与宇宙学重点实验室,上海 200030;中国科学院大学,北京 100049
- 折叠
摘要
Abstract
The kinetic Sunyaev-Zel'dovich (kSZ) effect is becoming a possible probe of the missing baryons, owing to the recent advance in CMB experiments and galaxy surveys. The kSZ power spectrum has been detected by various existing experiments, however significant improvement of accuracy is still required. Through a set of hydrodynamic simulations, we quantify the relative contribution of various gas components to the kSZ signals. We find that the warm-hot intergalactic medium (WHIM) contributes significantly to the kSZ power spectrum. This makes the kSZ power spectrum a promising probe of missing baryons. However, we find that contribution from the intracluster medium (ICM) is also significant. Therefore, apart from the diffculties in observational measurements, the interpretation of kSZ power spectrum requires careful investigation in order to reliably constrain the WHIM fraction.关键词
宇宙学/CMB/大尺度结构/SZ效应Key words
Cosmology/cosmic microwave background/the large scale structure/Sunyaev Zel'dovich effect分类
天文与地球科学引用本文复制引用
苗寒..kSZ效应的组分分析[J].天文学进展,2016,34(1):111-119,9.
