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Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
文献类型：期刊论文
| 作者 | Algaba, J. C.242; Anczarski, J.241; Asada, K.240; Baloković, M.238,239; Chandra, S.237; Cui, Y. -Z.235,236; Falcone, A. D.234; Giroletti, M.233; Goddi, C.231,232; Hada, K.235,236 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 911页码:L11 |
| ISSN号 | 0004-637X |
| 关键词 | Active galactic nuclei Radio cores Low-luminosity active galactic nuclei High energy astrophysics Astrophysical black holes Accretion Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics Astrophysics - Astrophysics of Galaxies |
| DOI | 10.3847/2041-8213/abef71 |
| 产权排序 | 232 |
| 英文摘要 | In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109M⊙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87's spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000746900400001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4727]  |
| 专题 | 星系宇宙学研究团组 脉冲星研究团组 射电天文研究室_利用南山26米射电望远镜观测数据的文章 |
| 作者单位 | 1.Also at INAF Trieste and Dept. of Physics and Astronomy, University of Bologna 2.Also at Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy; 3.Also at Port d’Informació Científica (PIC) E-08193 Bellaterra (Barcelona), Spain; 4.Now at University of Innsbruck; 5.UKRI Stephen Hawking Fellow; 6.NASA Hubble Fellowship Program, Einstein Fellow; 7.For questions concerning EHT results contact; 8.EACOA Fellow; 9.Center for Astronomy, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan; 10.Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Yamaguchi 753-8512, Japan; |
| 推荐引用方式 GB/T 7714 | Algaba, J. C.,Anczarski, J.,Asada, K.,et al. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign[J]. The Astrophysical Journal,2021,911:L11. |
| APA | Algaba, J. C..,Anczarski, J..,Asada, K..,Baloković, M..,Chandra, S..,...&Yonekura, Yoshinori.(2021).Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign.The Astrophysical Journal,911,L11. |
| MLA | Algaba, J. C.,et al."Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign".The Astrophysical Journal 911(2021):L11. |
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