Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods
文献类型：期刊论文
| 作者 | Tang, Chengfeng; Zhang, Pierre; Luo, Wentao3; Li, Nan4; Cai, Yi-Fu; Pi, Shi3,5
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2021 |
| 卷号 | 911期号:1页码:44 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abe69e |
| 英文摘要 | Source galaxy images are distorted not only by a static gravitational potential, but also by frame-dragging induced by massive rotating objects like clusters of galaxies. Such an effect is well understood theoretically; it is therefore of great interest to estimate its detectability for future surveys. In this work, we analyze the lensing convergence kappa around rotating dark matter halos. The rotation of the massive objects generates a gravitomagnetic potential giving rise to an anisotropic contribution to the lensing potential. We construct an estimator delta kappa to describe the difference between the symmetric enhancement and reduction of kappa around the halo rotation axis, finding that it is well approximated by a function proportional to the halo velocity dispersion squared times a dimensionless angular momentum parameter. Using simulation mocks with realistic noise level for a survey like the Legacy Survey of Space and Time (LSST), we test our estimator, and show that the signal from frame-dragging of stacked rotating lenses is consistent with zero within 1 sigma. However, we find that the most massive cluster in SDSS DR7 spectroscopic selected group catalog has a line-of-sight rotation velocity of 195.0 km s(-1) and velocity dispersion of 667.8 km s(-1), which is at 1.2 x 10(-8) odds according to the angular momentum probability distribution inferred from N-body simulations. By studying SDSS DR7 spectroscopic selected group catalog, we show how rotating clusters can be identified, and, finding that fast rotating clusters might be more abundant than in estimates based on simulations, a detection of gravitomagnetic distortion may be at reach in future surveys. |
| 学科主题 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27394]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Univ Sci & Technol China, Sch Phys Sci, Dept Astron, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China 4.Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, WPI, Chiba 2778582, Japan 5.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 6.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Chengfeng,Zhang, Pierre,Luo, Wentao,et al. Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods[J]. ASTROPHYSICAL JOURNAL,2021,911(1):44. |
| APA | Tang, Chengfeng,Zhang, Pierre,Luo, Wentao,Li, Nan,Cai, Yi-Fu,&Pi, Shi.(2021).Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods.ASTROPHYSICAL JOURNAL,911(1),44. |
| MLA | Tang, Chengfeng,et al."Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods".ASTROPHYSICAL JOURNAL 911.1(2021):44. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。