The rise and fall of galaxy activity in dark matter haloes
文献类型：期刊论文
| 作者 | Pasquali, Anna1; van den Bosch, Frank C.1; Mo, H. J.2; Yang, Xiaohu3,4,5; Somerville, Rachel1,6 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2009-03-21 |
| 卷号 | 394期号:1页码:38-50 |
| 关键词 | galaxies: active galaxies: clusters: general dark matter radio lines: galaxies |
| 英文摘要 | We use the catalogue of galaxy groups constructed from the Sloan Digital Sky Survey (SDSS DR4) by Yang et al. to study the dependence of galaxy activity on stellar mass, M(*), halo mass, M(h), and group hierarchy (central versus satellite galaxies). The wealth of data provided by the SDSS allows us to split the sample on the basis of galaxy activity in star-forming galaxies, galaxies with optical active galactic nuclei (AGN), composite galaxies (both star formation and optical AGN activity) and radio sources. We find a smooth transition in halo mass as the activity of central galaxies changes from star formation to optical AGN activity to radio emission. Star-forming centrals preferentially reside in haloes with M(h) < 10(12) h(-1) M(circle dot), central galaxies with optical AGN activity typically inhabit haloes with M(h) similar to 10(13) h(-1) M(circle dot) and centrals emitting in the radio mainly reside in haloes more massive than 10(14) h(-1) M(circle dot). Although this seems to suggest that the environment (halo mass) determines the type of activity of its central galaxy, we find a similar trend with stellar mass: central star formers typically have stellar masses less than 10(10) h(-2) M(circle dot), while optical AGN hosts and central radio sources have characteristic stellar masses of similar to 10(10.8) and similar to 10(11.6) h(-2) M(circle dot), respectively. Since more massive haloes typically host more massive centrals, it is unclear whether the activity of a central galaxy is causally connected to its stellar mass or to its halo mass. In general, satellite galaxies have their activity suppressed with respect to central galaxies of the same stellar mass. This holds not only for star formation activity, but also for AGN activity in the optical and the radio. At fixed stellar mass, we find that the activity of satellite galaxies depends only weakly on halo mass. In fact, using a set of reduced conditional probability functions, we find that for satellite galaxies the dependence of galaxy activity on halo mass is more than four times weaker than the dependence on stellar mass. All these results are consistent with a picture in which low-mass haloes accrete cold gas, while massive haloes have coronae of hot gas that promote radio activity of their central galaxies. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL-SKY-SURVEY ; MORPHOLOGY-DENSITY RELATION ; SUPERMASSIVE BLACK-HOLES ; STAR-FORMATION RATES ; EARLY DATA RELEASE ; GALACTIC NUCLEI ; RADIO-LOUD ; HOST GALAXIES ; ENVIRONMENTAL DEPENDENCE ; CLUSTER ENVIRONMENTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000263967700004 |
| 源URL | [http://119.78.226.72/handle/331011/19348]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 3.Shanghai Astron Observ, Partner Grp MPA, Shanghai 200030, Peoples R China 4.Shanghai Astron Observ, JOINGC, Shanghai 200030, Peoples R China 5.Univ Sci & Technol China, Hefei, Peoples R China 6.Space Telescope Sci Inst, Baltimore, MD 21218 USA |
| 推荐引用方式 GB/T 7714 | Pasquali, Anna,van den Bosch, Frank C.,Mo, H. J.,et al. The rise and fall of galaxy activity in dark matter haloes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,394(1):38-50. |
| APA | Pasquali, Anna,van den Bosch, Frank C.,Mo, H. J.,Yang, Xiaohu,&Somerville, Rachel.(2009).The rise and fall of galaxy activity in dark matter haloes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,394(1),38-50. |
| MLA | Pasquali, Anna,et al."The rise and fall of galaxy activity in dark matter haloes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 394.1(2009):38-50. |
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