MULTIPOLE GRAVITATIONAL LENSING AND HIGH-ORDER PERTURBATIONS ON THE QUADRUPOLE LENS
文献类型：期刊论文
| 作者 | Chu, Z.1,2; Lin, W. P.1,2; Li, G. L.3; Kang, X.4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2013-03-10 |
| 卷号 | 765期号:2页码:134(10PP) |
| ISSN号 | 0004-637X |
| 关键词 | gravitational lensing: strong methods: analytical methods: numerical |
| 通讯作者 | Chu, Z (reprint author), Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China. Email: chuzhe@shao.ac.cn ; linwp@shao.ac.cn |
| 英文摘要 | An arbitrary surface mass density of the gravitational lens can be decomposed into multipole components. We simulate the ray tracing for the multipolar mass distribution of the generalized Singular Isothermal Sphere model based on deflection angles, which are analytically calculated. The magnification patterns in the source plane are then derived from an inverse shooting technique. As has been found, the caustics of odd mode lenses are composed of two overlapping layers for some lens models. When a point source traverses this kind of overlapping caustics, the image numbers change by +/- 4, rather than +/- 2. There are two kinds of caustic images. One is the critical curve and the other is the transition locus. It is found that the image number of the fold is exactly the average value of image numbers on two sides of the fold, while the image number of the cusp is equal to the smaller one. We also focus on the magnification patterns of the quadrupole (m = 2) lenses under the perturbations of m = 3, 4, and 5 mode components and found that one, two, and three butterfly or swallowtail singularities can be produced, respectively. With the increasing intensity of the high-order perturbations, the singularities grow up to bring sixfold image regions. If these perturbations are large enough to let two or three of the butterflies or swallowtails make contact, then eightfold or tenfold image regions can be produced as well. The possible astronomical applications are discussed. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MASS PROFILES ; GALAXIES ; MAGNIFICATION ; SUBSTRUCTURE ; SIMULATIONS ; MODELS ; IMAGES ; CLASSIFICATION ; ELLIPTICITY ; STATISTICS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000315921500059 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9907]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Acad Sinica, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 4.Acad Sinica, Purple Mt Observ, Partner Grp MPI Astron, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Z.,Lin, W. P.,Li, G. L.,et al. MULTIPOLE GRAVITATIONAL LENSING AND HIGH-ORDER PERTURBATIONS ON THE QUADRUPOLE LENS[J]. ASTROPHYSICAL JOURNAL,2013,765(2):134(10PP). |
| APA | Chu, Z.,Lin, W. P.,Li, G. L.,&Kang, X..(2013).MULTIPOLE GRAVITATIONAL LENSING AND HIGH-ORDER PERTURBATIONS ON THE QUADRUPOLE LENS.ASTROPHYSICAL JOURNAL,765(2),134(10PP). |
| MLA | Chu, Z.,et al."MULTIPOLE GRAVITATIONAL LENSING AND HIGH-ORDER PERTURBATIONS ON THE QUADRUPOLE LENS".ASTROPHYSICAL JOURNAL 765.2(2013):134(10PP). |
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来源：紫金山天文台
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