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.13; Anczarski,J.14; Asada,K.15; Balokovi?,M.16,17; Chandra,S.18; Cui,Y.-Z.19,20; Falcone,A. D.21; Giroletti,M.22; Goddi,C.23,24; Hada,K.19,20 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 911期号:1 |
| ISSN号 | 2041-8205 |
| 关键词 | Active galactic nuclei Radio cores Low-luminosity active galactic nuclei High energy astrophysics Astrophysical black holes Accretion |
| DOI | 10.3847/2041-8213/abef71 |
| 英文摘要 | Abstract 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. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-911-1-ABEF71 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/59409]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Markoff,S. |
| 作者单位 | 1.National Institute for Astrophysics (INAF), I-00136 Rome, Italy 2.ETH Zürich, CH-8093 Zürich, Switzerland 3.Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA 4.Center for Astronomy, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan 5.Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Yamaguchi 753-8512, Japan 6.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China 7.Department of Physical Sciences, Cork Institute of Technology, Bishopstown, Cork, Ireland 8.Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam-Golm, Germany and DESY, Platanenallee 6, D-15738 Zeuthen, Germany 9.Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA 10.Department of Physics and Astronomy, University of Iowa, Van Allen Hall, Iowa City, IA 52242, USA |
| 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 Letters,2021,911(1). |
| APA | Algaba,J. C..,Anczarski,J..,Asada,K..,Balokovi?,M..,Chandra,S..,...&Yonekura,Yoshinori.(2021).Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign.The Astrophysical Journal Letters,911(1). |
| MLA | Algaba,J. C.,et al."Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign".The Astrophysical Journal Letters 911.1(2021). |
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