Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods
文献类型：期刊论文
| 作者 | Tang,Chengfeng2,5,6; Zhang,Pierre2,5,6; Luo,Wentao2,4; Li,Nan3 ; Cai,Yi-Fu2,5,6; Pi,Shi1,4
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2021-04-01 |
| 卷号 | 911期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Galaxy clusters General relativity |
| DOI | 10.3847/1538-4357/abe69e |
| 英文摘要 | Abstract 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 κ 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 δ κ to describe the difference between the symmetric enhancement and reduction of κ 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 1σ. 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 × 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. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-911-1-ABE69E |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/58143]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China 2.Department of Astronomy, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China; wentao.luo@ipmu.jp, yifucai@ustc.edu.cn 3.National Astronomical Observatories, Chinese Academy of Sciences 20A Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of China 4.Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), The University of Tokyo, Chiba 277-8582, Japan 5.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China 6.CAS Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of 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]. The Astrophysical Journal,2021,911(1). |
| APA | Tang,Chengfeng,Zhang,Pierre,Luo,Wentao,Li,Nan,Cai,Yi-Fu,&Pi,Shi.(2021).Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods.The Astrophysical Journal,911(1). |
| MLA | Tang,Chengfeng,et al."Measuring the Gravitomagnetic Distortion from Rotating Halos. I. Methods".The Astrophysical Journal 911.1(2021). |
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来源：国家天文台
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