Properties of wide-separation lensed quasars by clusters of galaxies in the Sloan Digital Sky Survey
文献类型：期刊论文
| 作者 | Li, G. L.; Mao, S.; Jing, Y. P.; Lin, W. P.; Oguri, M. |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2007-06-21 |
| 卷号 | 378期号:2页码:469-481 |
| 关键词 | gravitational lensing galaxies : clusters : general cosmological parameters dark matter |
| 英文摘要 | We use high-resolution N-body numerical simulations to study the number of predicted large-separation multiply imaged systems produced by clusters of galaxies in the Sloan Digital Sky Survey (SDSS) photometric and spectroscopic quasar samples. We incorporate the condensation of baryons at the centre of clusters by (artificially) adding a brightest cluster galaxy (BCG) as a truncated isothermal sphere. We make predictions in two flat cosmological models: a Lambda cold dark matter (Lambda CDM) model with a matter density Omega(m,0) = 0.3, sigma(8) = 0.9 (Lambda CDM 0) and a model favoured by the Wilkinson Microwave Anisotropy Probe (WMAP) three-year data with Omega(m,0) = 0.238 and sigma(8)= 0.74 (WMAP3). We found that the predicted multiply imaged quasars with separation > 10 arcsec is about 6.2 and 2.6 for the SDSS photometric (with an effective area of 8000 deg(2)) and spectroscopic (with an effective area of 5000 deg(2)) quasar samples, respectively, in the Lambda CDM0 model; the predicted numbers of large-separation lensed quasars agree well with the observations. These numbers are reduced by a factor of 7 or more in the WMAP3 model, and are consistent with the data at less than or similar to 8 per cent level. The predicted cluster lens redshift peaks around redshift 0.5, and 90 per cent are between 0.2 and 1. The ratio of systems with at least four image systems (N-img >= 4) and those with N-img >= 2 is about 1/3.5 for both the Lambda CDM0 and the WMAP3 models, and for both the photometric and the spectroscopic quasar samples. We find that the BCG creates a central circular region, comparable to the Einstein ring of the BCG, where the central image disappears in the usual three- and five-image configurations. If we include four image systems as an extreme case of five-image systems (with an infinitely demagnified central image), we find that 68 per cent of the central images are fainter by a factor of 100 than the brightest image and about 80 per cent are within 1.5 arcsec of the BCG. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 星系与宇宙学研究中心 |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | COLD DARK-MATTER ; SUPERMASSIVE BLACK-HOLES ; GRAVITATIONAL LENSES ; LUMINOSITY FUNCTION ; IMAGE SEPARATION ; ARC STATISTICS ; ELLIPSOIDAL COLLAPSE ; LENSING STATISTICS ; SDSS J1004+4112 ; REDSHIFT SURVEY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000247262600006 |
| 公开日期 | 2010-11-08 |
| 源URL | [http://119.78.226.72//handle/331011/11855]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Shanghai Astron Observ, Partner Grp MPA, Shanghai 200030, Peoples R China 2.Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England 3.Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA |
| 推荐引用方式 GB/T 7714 | Li, G. L.,Mao, S.,Jing, Y. P.,et al. Properties of wide-separation lensed quasars by clusters of galaxies in the Sloan Digital Sky Survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,378(2):469-481. |
| APA | Li, G. L.,Mao, S.,Jing, Y. P.,Lin, W. P.,&Oguri, M..(2007).Properties of wide-separation lensed quasars by clusters of galaxies in the Sloan Digital Sky Survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,378(2),469-481. |
| MLA | Li, G. L.,et al."Properties of wide-separation lensed quasars by clusters of galaxies in the Sloan Digital Sky Survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 378.2(2007):469-481. |
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来源：上海天文台
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