ELUCID. VI. Cosmic Variance of the Galaxy Distribution in the Local Universe
文献类型：期刊论文
| 作者 | Chen, Yangyao1,2; Mo, H. J.1,2,8; Li, Cheng1,2; Wang, Huiyuan3,7; Yang, Xiaohu5,6; Zhou, Huang1,2; Zhang, Youcai4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-02-20 |
| 卷号 | 872期号:2页码:16 |
| ISSN号 | 0004-637X |
| 关键词 | dark matter galaxies: halos large-scale structure of universe methods: statistical |
| DOI | 10.3847/1538-4357/ab0208 |
| 英文摘要 | Halo merger trees are constructed from ELUCID, a constrained N-body simulation in the Sloan Digital Sky Survey (SDSS) volume. These merger trees are used to populate dark matter halos with galaxies according to an empirical model of galaxy formation. Mock catalogs in the SDSS sky coverage are constructed, which can be used to study the spatial distribution of galaxies in the low-z universe. These mock catalogs are used to quantify the cosmic variance (CV) in the galaxy stellar mass function (GSMF) measured from the SDSS survey. The GSMF estimated from the SDSS magnitude-limited sample can be affected significantly by the presence of an underdense region at z < 0.03, so that the low-mass end of the function can be underestimated significantly. Several existing methods designed to deal with the effects of the CV in the estimate of the GSMF are tested, and none is found to be able to fully account for the CV. We propose a method based on conditional stellar mass functions in dark matter halos, which can provide an unbiased estimate of the global GSMF. The application of the method to SDSS data shows that the GSMF has a significant upturn at M-* < 10(9.5) h(-1) M-circle dot, which has been missed in many earlier measurements of the local GSMF. |
| 资助项目 | National Key R&D Program of China[2018YFA0404503] ; National Key R&D Program of China[2018YFA0404502] ; National Key Basic Research Program of China[2015CB857002] ; National Key Basic Research Program of China[2015CB857004] ; National Science Foundation of China[11233005] ; National Science Foundation of China[11621303] ; National Science Foundation of China[11522324] ; National Science Foundation of China[11421303] ; National Science Foundation of China[11503065] ; National Science Foundation of China[11673015] ; National Science Foundation of China[11733004] ; National Science Foundation of China[11320101002] ; NSF[AST-1517528] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000460814000003 |
| 源URL | [http://119.78.226.72/handle/331011/31891]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Chen, Yangyao |
| 作者单位 | 1.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 2.Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China 3.Univ Sci & Technol China, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 4.Shanghai Astron Observ, Shanghai 200030, Peoples R China 5.Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, Shanghai 200240, Peoples R China 6.Shanghai Jiao Tong Univ, Dept Astron, Shanghai 200240, Peoples R China 7.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China 8.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA |
| 推荐引用方式 GB/T 7714 | Chen, Yangyao,Mo, H. J.,Li, Cheng,et al. ELUCID. VI. Cosmic Variance of the Galaxy Distribution in the Local Universe[J]. ASTROPHYSICAL JOURNAL,2019,872(2):16. |
| APA | Chen, Yangyao.,Mo, H. J..,Li, Cheng.,Wang, Huiyuan.,Yang, Xiaohu.,...&Zhang, Youcai.(2019).ELUCID. VI. Cosmic Variance of the Galaxy Distribution in the Local Universe.ASTROPHYSICAL JOURNAL,872(2),16. |
| MLA | Chen, Yangyao,et al."ELUCID. VI. Cosmic Variance of the Galaxy Distribution in the Local Universe".ASTROPHYSICAL JOURNAL 872.2(2019):16. |
入库方式： OAI收割
来源：上海天文台
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