An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations

	An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations
	Tang, Lin; Lin, Weipeng; Cui, Weiguang; Kang, Xi; Wang, Yang; Contini, E.; Yu, Yu
刊名	ASTROPHYSICAL JOURNAL
	2018
卷号	859 期号:2 页码:85
英文摘要	Intracluster light (ICL) in observations is usually identified through the surface brightness limit (SBL) method. In this paper, for the first time we produce mock images of galaxy groups and clusters, using a cosmological hydrodynamical simulation to investigate the ICL fraction and focus on its dependence on observational parameters, e.g., the SBL, the effects of cosmological redshift-dimming, point-spread function (PSF), and CCD pixel size. Detailed analyses suggest that the width of the PSF has a significant effect on the measured ICL fraction, while the relatively small pixel size shows almost no influence. It is found that the measured ICL fraction depends strongly on the SBL. At a fixed SBL and redshift, the measured ICL fraction decreases with increasing halo mass, while with a much fainter SBL, it does not depend on halo mass at low redshifts. In our work, the measured ICL fraction shows a clear dependence on the cosmological redshift-dimming effect. It is found that there is more mass locked in the ICL component than light, suggesting that the use of a constant mass-to-light ratio at high surface brightness levels will lead to an underestimate of ICL mass. Furthermore, it is found that the radial profile of ICL shows a characteristic radius that is almost independent of halo mass. The current measurement of ICL from observations has a large dispersion due to different methods, and we emphasize the importance of using the same definition when observational results are compared with theoretical predictions.
语种	英语
WOS记录号	WOS:000433172900008
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/18064]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Tang, Lin,Lin, Weipeng,Cui, Weiguang,et al. An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations[J]. ASTROPHYSICAL JOURNAL,2018,859(2):85.
APA	Tang, Lin.,Lin, Weipeng.,Cui, Weiguang.,Kang, Xi.,Wang, Yang.,...&Yu, Yu.(2018).An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations.ASTROPHYSICAL JOURNAL,859(2),85.
MLA	Tang, Lin,et al."An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations".ASTROPHYSICAL JOURNAL 859.2(2018):85.