First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
文献类型：期刊论文
| 作者 | Akiyama,Kazunori66,67,68,69; Alberdi,Antxon65; Alef,Walter64; Asada,Keiichi63; Azulay,Rebecca61,62,64; Baczko,Anne-Kathrin64; Ball,David60; Balokovi?,Mislav59,66; Barrett,John68; Bintley,Dan58 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2019-04-10 |
| 卷号 | 875期号:1 |
| ISSN号 | 2041-8205 |
| 关键词 | accretion, accretion disks black hole physics galaxies: individual (M87) galaxies: jets magnetohydrodynamics (MHD) techniques: high angular resolution |
| DOI | 10.3847/2041-8213/ab0f43 |
| 英文摘要 | Abstract The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data. To this end, we construct a large library of models based on general relativistic magnetohydrodynamic (GRMHD) simulations and synthetic images produced by general relativistic ray tracing. We compare the observed visibilities with this library and confirm that the asymmetric ring is consistent with earlier predictions of strong gravitational lensing of synchrotron emission from a hot plasma orbiting near the black hole event horizon. The ring radius and ring asymmetry depend on black hole mass and spin, respectively, and both are therefore expected to be stable when observed in future EHT campaigns. Overall, the observed image is consistent with expectations for the shadow of a spinning Kerr black hole as predicted by general relativity. If the black hole spin and M87’s large scale jet are aligned, then the black hole spin vector is pointed away from Earth. Models in our library of non-spinning black holes are inconsistent with the observations as they do not produce sufficiently powerful jets. At the same time, in those models that produce a sufficiently powerful jet, the latter is powered by extraction of black hole spin energy through mechanisms akin to the Blandford-Znajek process. We briefly consider alternatives to a black hole for the central compact object. Analysis of existing EHT polarization data and data taken simultaneously at other wavelengths will soon enable new tests of the GRMHD models, as will future EHT campaigns at 230 and 345 GHz. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-875-1-AB0F43 |
| 源URL | [http://119.78.226.72/handle/331011/31827]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.Department of Astronomy, Yonsei University, Yonsei-ro 50, Seodaemun-gu, 03722 Seoul, Republic of Korea 2.Aalto University Mets?hovi Radio Observatory, Mets?hovintie 114, 02540 Kylm?l?, Finland 3.Aalto University Department of Electronics and Nanoengineering, PL 15500, 00076 Aalto, Finland 4.Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia 58089, México 5.Department of Physics, National Taiwan University, No.1, Sect.4, Roosevelt Rd., Taipei 10617, Taiwan, R.O.C 6.Italian ALMA Regional Centre, INAF-Istituto di Radioastronomia, Via P. Gobetti 101, 40129 Bologna, Italy 7.Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Nanjing 210023, People’s Republic of China 8.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People’s Republic of China 9.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing, People’s Republic of China 10.National Optical Astronomy Observatory, 950 North Cherry Ave., Tucson, AZ 85719, USA |
| 推荐引用方式 GB/T 7714 | Akiyama,Kazunori,Alberdi,Antxon,Alef,Walter,et al. First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring[J]. The Astrophysical Journal Letters,2019,875(1). |
| APA | Akiyama,Kazunori.,Alberdi,Antxon.,Alef,Walter.,Asada,Keiichi.,Azulay,Rebecca.,...&Zhang,Shuo.(2019).First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring.The Astrophysical Journal Letters,875(1). |
| MLA | Akiyama,Kazunori,et al."First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring".The Astrophysical Journal Letters 875.1(2019). |
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