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.95; Anczarski,J.96; Asada,K.97; Balokovi?,M.98,99; Chandra,S.100; Cui,Y.-Z.101,102; Falcone,A. D.103; Giroletti,M.104; Goddi,C.105,106; Hada,K.101,102 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 911期号:1 |
| 关键词 | Active galactic nuclei Radio cores Low-luminosity active galactic nuclei High energy astrophysics Astrophysical black holes Accretion |
| ISSN号 | 2041-8205 |
| 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 |
| WOS记录号 | IOP:2041-8205-911-1-ABEF71 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/59436]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Markoff,S. |
| 作者单位 | 1.School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA 2.Physics Department, National Sun Yat-Sen University, No. 70, Lien-Hai Rd, Kaosiung City 80424, Taiwan, R.O.C 3.University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK 4.IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France 5.University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia 6.Instytut Fizyki Ja?drowej PAN, ul. Radzikowskiego 152, 31-342 Kraków, Poland 7.DESY, D-15738 Zeuthen, Germany 8.Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland 9.Department of Physics and Electrical Engineering, Linnaeus University, SE-351 95 V?xj?, Sweden 10.Institut für Astronomie und Astrophysik, Universit?t Tübingen, Sand 1, D-72076 Tübingen, Germany |
| 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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来源：国家天文台
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