Halo masses for optically selected and for radio-loud AGN from clustering and galaxy-galaxy lensing
文献类型：期刊论文
| 作者 | Mandelbaum, Rachel; Li, Cheng1,2; Kauffmann, Guinevere1; White, Simon D. M.1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2009-02-21 |
| 卷号 | 393期号:2页码:377-392 |
| 关键词 | gravitational lensing galaxies: active galaxies: formation galaxies: haloes dark matter large-scale structure of Universe |
| 英文摘要 | We compute two-point correlation functions and measure the shear signal due to galaxy-galaxy lensing for 80 000 optically identified and 5700 radio-loud active galactic nuclei (AGN) from Data Release 4 of the Sloan Digital Sky Survey. Halo occupation models are used to estimate halo masses and satellite fractions for these two types of AGN. The large sample size allows us to separate AGN according to the stellar mass of their host galaxies. We study how the halo masses of optical and radio AGN differ from those of the parent population at fixed M(double dagger). Halo masses deduced from clustering and from lensing agree satisfactorily. Radio AGN are found in more massive haloes than optical AGN: in our samples, their mean halo masses are 1.6 x 10(13) and 8 x 10(11) h(-1) M(circle dot), respectively. Optical AGN follow the same relation between stellar mass and halo mass as galaxies selected without regard to nuclear properties, but radio-loud AGN deviate significantly from this relation. The dark matter haloes of radio-loud AGN are about twice as massive as those of control galaxies of the same stellar mass. This boost is independent of radio luminosity, and persists even when our analysis is restricted to field galaxies. The large-scale gaseous environment of the galaxy clearly plays a crucial role in producing observable radio emission. The dark matter halo masses that we derive for the AGN in our two samples are in good agreement with recent models in which feedback from radio AGN becomes dominant in haloes where gas cools quasi-statically. |
| 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 ; ACTIVE GALACTIC NUCLEI ; SPECTROSCOPIC TARGET SELECTION ; PHOTOMETRICALLY CLASSIFIED QUASARS ; DATA RELEASE ; BLACK-HOLES ; VELOCITY DISPERSION ; LUMINOSITY FUNCTION ; COMPLETE SAMPLE ; REDSHIFT SURVEY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000263302300003 |
| 源URL | [http://119.78.226.72/handle/331011/19543]  |
| 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 Astrophys, D-85741 Garching, Germany 2.Shanghai Astron Observ, MPA SHAO Joint Ctr Astrophys Cosmol, Shanghai 200030, NJ, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mandelbaum, Rachel,Li, Cheng,Kauffmann, Guinevere,et al. Halo masses for optically selected and for radio-loud AGN from clustering and galaxy-galaxy lensing[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,393(2):377-392. |
| APA | Mandelbaum, Rachel,Li, Cheng,Kauffmann, Guinevere,&White, Simon D. M..(2009).Halo masses for optically selected and for radio-loud AGN from clustering and galaxy-galaxy lensing.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,393(2),377-392. |
| MLA | Mandelbaum, Rachel,et al."Halo masses for optically selected and for radio-loud AGN from clustering and galaxy-galaxy lensing".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 393.2(2009):377-392. |
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