中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations

文献类型:期刊论文

作者Tang,Lin1,2; Lin,Weipeng1,3; Cui,Weiguang4; Kang,Xi5; Wang,Yang3; Contini,E.6; Yu,Yu1
刊名The Astrophysical Journal
出版日期2018-05-25
卷号859期号:2
ISSN号0004-637X
关键词galaxies: clusters: general galaxies: clusters: intracluster medium galaxies: evolution galaxies: statistics methods: numerical methods: observational
DOI10.3847/1538-4357/aabd78
英文摘要Abstract 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
出版者The American Astronomical Society
WOS记录号IOP:0004-637X-859-2-AABD78
源URL[http://libir.pmo.ac.cn/handle/332002/22000]  
专题中国科学院紫金山天文台
作者单位1.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory; Nandan Road 80, Shanghai 200030, People's Republic of China tangl08@shao.ac.cn, linweip5@mail.sysu.edu.cn
2.University of Chinese Academy of Sciences, 19A, Yuquan Road, Beijing, People's Republic of China
3.School of Physics and Astronomy, Sun Yat-sen University, Xingang West Road 135, Guangzhou 510275, People's Republic of China
4.Departamento de Física Teórica, Módulo 15, Facultad de Ciencias, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
5.The Partner Group of MPI for Astronomy, Purple Mountain Observatory, 2 West Beijing Road, Nanjing 210008, People's Republic of China; kangxi@pmo.ac.cn
6.Department of Astronomy and Yonsei University Observatory, Yonsei University, Yonsei-ro 50, Seoul 03722, Republic of Korea
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Tang,Lin,Lin,Weipeng,Cui,Weiguang,et al. An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations[J]. The Astrophysical Journal,2018,859(2).
APA Tang,Lin.,Lin,Weipeng.,Cui,Weiguang.,Kang,Xi.,Wang,Yang.,...&Yu,Yu.(2018).An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations.The Astrophysical Journal,859(2).
MLA Tang,Lin,et al."An Investigation of Intracluster Light Evolution Using Cosmological Hydrodynamical Simulations".The Astrophysical Journal 859.2(2018).

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