Detection of galaxy assembly bias
文献类型：期刊论文
| 作者 | Wang, Lan1 ; Weinmann, Simone M.2; De Lucia, Gabriella3; Yang, Xiaohu4,5
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2013-07-01 |
| 卷号 | 433期号:1页码:515-520 |
| 关键词 | galaxies: formation galaxies: haloes |
| 英文摘要 | Assembly bias describes the finding that the clustering of dark matter haloes depends on halo formation time at fixed halo mass. In this paper, we analyse the influence of assembly bias on galaxy clustering using both semi-analytic galaxy formation models (SAMs) and observational data. At fixed stellar mass, SAMs predict that the clustering of central galaxies depends on the specific star formation rate (sSFR), with more passive galaxies having a higher clustering amplitude. We find similar trends using the Sloan Digital Sky Survey (SDSS) group catalogues, and verify that these are not affected by possible biases due to the group finding algorithm. Low-mass central galaxies reside in narrow bins of halo mass, so the observed trends of higher clustering amplitude for galaxies with lower sSFR is not driven by variations of the parent halo mass. We argue that the clustering dependence on sSFR represent a direct detection of assembly bias. In addition, contrary to what expected based on clustering of dark matter haloes, we find that low-mass central galaxies in SAMs with larger host halo mass have a lower clustering amplitude than their counter-parts residing in lower mass haloes. This results from the fact that, at fixed stellar mass, assembly bias has a stronger influence on clustering than the dependence on the parent halo mass. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000321461200041 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5700]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Max Planck Inst Astrophys, Partner Grp, Beijing, Peoples R China 2.Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands 3.INAF Astron Observ Trieste, I-34143 Trieste, Italy 4.Shanghai Jiao Tong Univ, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 5.Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lan,Weinmann, Simone M.,De Lucia, Gabriella,et al. Detection of galaxy assembly bias[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,433(1):515-520. |
| APA | Wang, Lan,Weinmann, Simone M.,De Lucia, Gabriella,&Yang, Xiaohu.(2013).Detection of galaxy assembly bias.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,433(1),515-520. |
| MLA | Wang, Lan,et al."Detection of galaxy assembly bias".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 433.1(2013):515-520. |
入库方式： OAI收割
来源：国家天文台
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