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First M87 Event Horizon Telescope Results. II. Array and Instrumentation
https://hiroshima.repo.nii.ac.jp/records/2008903
https://hiroshima.repo.nii.ac.jp/records/200890359c16b14-a086-4a36-b8e4-465ae4459587
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ApJL_875_L2.pdf (3.1 MB)
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| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||||
| タイトル | ||||||||||
| タイトル | First M87 Event Horizon Telescope Results. II. Array and Instrumentation | |||||||||
| 言語 | en | |||||||||
| 作成者 |
The Event Horizon Telescope Collaboration
× The Event Horizon Telescope Collaboration
× Sasada, Mahito
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| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| 権利情報 | ||||||||||
| 権利情報 | © 2019. The American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | black hole physics | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | galaxies: individual (M87) | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | Galaxy: center | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | gravitational lensing: strong | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | instrumentation: interferometers | |||||||||
| 主題 | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | echniques: high angular resolution | |||||||||
| 内容記述 | ||||||||||
| 内容記述 | The Event Horizon Telescope (EHT) is a very long baseline interferometry (VLBI) array that comprises millimeter- and submillimeter-wavelength telescopes separated by distances comparable to the diameter of the Earth. At a nominal operating wavelength of ∼1.3 mm, EHT angular resolution (λ/D) is ∼25 μas, which is sufficient to resolve nearby supermassive black hole candidates on spatial and temporal scales that correspond to their event horizons. With this capability, the EHT scientific goals are to probe general relativistic effects in the strong-field regime and to study accretion and relativistic jet formation near the black hole boundary. In this Letter we describe the system design of the EHT, detail the technology and instrumentation that enable observations, and provide measures of its performance. Meeting the EHT science objectives has required several key developments that have facilitated the robust extension of the VLBI technique to EHT observing wavelengths and the production of instrumentation that can be deployed on a heterogeneous array of existing telescopes and facilities. To meet sensitivity requirements, high-bandwidth digital systems were developed that process data at rates of 64 gigabit s^−1, exceeding those of currently operating cm-wavelength VLBI arrays by more than an order of magnitude. Associated improvements include the development of phasing systems at array facilities, new receiver installation at several sites, and the deployment of hydrogen maser frequency standards to ensure coherent data capture across the array. These efforts led to the coordination and execution of the first Global EHT observations in 2017 April, and to event-horizon-scale imaging of the supermassive black hole candidate in M87. | |||||||||
| 言語 | en | |||||||||
| 出版者 | ||||||||||
| 出版者 | The American Astronomical Society | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | journal article | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| 関連情報 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | 10.3847/2041-8213/ab0c96 | |||||||||
| 関連情報 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | https://doi.org/10.3847/2041-8213/ab0c96 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 2041-8205 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 2041-8213 | |||||||||
| 開始ページ | ||||||||||
| 開始ページ | L2 | |||||||||
| 書誌情報 |
The Astrophysical Journal Letters The Astrophysical Journal Letters 巻 875, 号 1, p. L2, 発行日 2019-04-10 |
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| 旧ID | 48225 | |||||||||
