Magnification cross-sections of gravitational lensing by galaxies in general FLRW cosmologies
文献类型：期刊论文
| 作者 | Zhu, ZH; Zhu, ZH , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China. |
| 刊名 | ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 1998 |
| 卷号 | 338期号:3页码:777-780 |
| 关键词 | Luminosity Function Redshift Survey Faint Galaxies Constant Density Limits |
| ISSN号 | 0004-6361 |
| 英文摘要 | For a wide variety of cosmological models characterized by the cosmic mass density Omega(M) and the normalized cosmological constant Omega(Lambda), we derive an analytic expression for the estimate of magnification cross-sections by an ensemble of isothermal spheres as models of galactic mass distributions. This provides a simple approach to demonstrate how the lensing probability by galaxies depends on the cosmological parameters. An immediate consequence is that, while a non-zero cosmological constant indeed leads to a significant increase of the lensing probability as it has been shown in the literature, only a small fraction of sky to z similar to 3 can be moderately (mu similar to 1.3) lensed by galaxies even in a Lambda-dominated flat universe. Therefore, whether or not there is a nonzero cosmological constant, it is unlikely that the overall quasar counts have been seriously contaminated by the presence of galactic lenses. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000076735400010 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/12248]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Zhu, ZH , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Zhu, ZH,Zhu, ZH , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.. Magnification cross-sections of gravitational lensing by galaxies in general FLRW cosmologies[J]. ASTRONOMY AND ASTROPHYSICS,1998,338(3):777-780. |
| APA | Zhu, ZH,&Zhu, ZH , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(1998).Magnification cross-sections of gravitational lensing by galaxies in general FLRW cosmologies.ASTRONOMY AND ASTROPHYSICS,338(3),777-780. |
| MLA | Zhu, ZH,et al."Magnification cross-sections of gravitational lensing by galaxies in general FLRW cosmologies".ASTRONOMY AND ASTROPHYSICS 338.3(1998):777-780. |
入库方式： OAI收割
来源：理论物理研究所
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