The size evolution of elliptical galaxies
文献类型：期刊论文
| 作者 | Xie, Lizhi1 ; Guo, Qi1,2; Cooper, Andrew P.1,2; Frenk, Carlos S.2; Li, Ran1; Gao, Liang1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2015-02-11 |
| 卷号 | 447期号:1页码:636-645 |
| 关键词 | methods: numerical galaxies: evolution |
| 英文摘要 | Recent work has suggested that the amplitude of the size-mass relation of massive early-type galaxies (ETGs) evolves with redshift. Here we use a semi-analytical galaxy formation model to study the size evolution of massive ETGs. We find this model is able to reproduce the amplitude and slope of the relation between size and stellar mass for these galaxies, as well as its evolution. The amplitude of this relation reflects the typical compactness of dark haloes at the time when most of the stars are formed. This link between size and star formation epoch is propagated in galaxy mergers. Mergers of high or moderate mass ratio (less than 1: 3) become increasingly important with increasing present day stellar mass for galaxies more massive than 10(11.4)M(circle dot). At lower masses, low mass ratio mergers play a more important role. In situ star formation contributes more to the size growth than it does to stellar mass growth. We also find that, for ETGs identified at z = 2, minor mergers dominate subsequent growth both for stellar mass and in size, consistent with earlier theoretical results. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000350272700050 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5727]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Partner Grp Max Planck Inst Astrophys, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Durham, Inst Computat Cosmol, Dept Phys, Sci Labs, Durham DH1 3LE, England |
| 推荐引用方式 GB/T 7714 | Xie, Lizhi,Guo, Qi,Cooper, Andrew P.,et al. The size evolution of elliptical galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,447(1):636-645. |
| APA | Xie, Lizhi,Guo, Qi,Cooper, Andrew P.,Frenk, Carlos S.,Li, Ran,&Gao, Liang.(2015).The size evolution of elliptical galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,447(1),636-645. |
| MLA | Xie, Lizhi,et al."The size evolution of elliptical galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447.1(2015):636-645. |
入库方式： OAI收割
来源：国家天文台
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