Modelling galaxy stellar mass evolution from z similar to 0.8 to today
文献类型：期刊论文
| 作者 | Wang, Lan1,2 ; Jing, Y. P.2
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2010-03-01 |
| 卷号 | 402期号:3页码:1796-1806 |
| 关键词 | galaxies: haloes galaxies: high-redshift galaxies: luminosity function mass function galaxies: stellar content dark matter large-scale structure of Universe |
| 英文摘要 | We apply the empirical method built for redshift z = 0 in the previous work of Wang et al. to a higher redshift, to link galaxy stellar mass directly with its hosting dark matter halo mass at a redshift of around 0.8. The M(stars)-M(infall) relation of the galaxy stellar mass M(stars) and the host halo mass M(infall) is constrained by fitting both the stellar mass function and the correlation functions at different stellar mass intervals of Visible Multiobject Spectrograph-Very Large Telescope Deep Survey (VVDS) observations, where M(infall) is the mass of the hosting halo at the time when the galaxy was last the central galaxy. We find that for low-mass haloes, the residing central galaxies at high redshift are less massive than those at low redshift. For high-mass haloes, central galaxies in these haloes at high redshift are somewhat more massive than the galaxies at low redshift. Satellite galaxies are less massive at earlier times, for any given mass of hosting halo. Fitting both Sloan Digital Sky Survey (SDSS) and VVDS observations simultaneously, we also propose a unified model of the M(stars)-M(infall) relation, which describes the evolution of central galaxy mass as a function of time. The stellar mass of a satellite galaxy is determined by the M(stars)-M(infall) relation of central galaxies at the time when the galaxy is accreted and becomes a subcomponent of a larger group. With these models, we study the amount of galaxy stellar mass increase from z similar to 0.8 to the present day through galaxy mergers and star formation. Low-mass galaxies (< 3 x 1010 h-1 M(circle dot)) gain their stellar masses from z similar to 0.8 to z = 0 mainly through star formation. For galaxies of higher mass, we find that the increase of stellar mass solely through mergers from z = 0.8 can make massive galaxies a factor similar to 2 larger than observed at z = 0, unless the satellite stellar mass is scattered to intracluster stars by gravitational tidal stripping or to the extended halo around the central galaxy, which is not counted in local observations. We can also predict stellar mass functions for redshifts up to z similar to 3, and the results are consistent with the latest observations. In future, more precise observational data will allow us better to constrain our model. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000274483500032 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7767]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Shanghai Astron Observ, MPA SHAO Joint Ctr Astrophys Cosmol, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lan,Jing, Y. P.. Modelling galaxy stellar mass evolution from z similar to 0.8 to today[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,402(3):1796-1806. |
| APA | Wang, Lan,&Jing, Y. P..(2010).Modelling galaxy stellar mass evolution from z similar to 0.8 to today.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,402(3),1796-1806. |
| MLA | Wang, Lan,et al."Modelling galaxy stellar mass evolution from z similar to 0.8 to today".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 402.3(2010):1796-1806. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。