First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
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第一个 M87 事件视界望远镜结果。
DOI：
10.3847/2041-8213/abe71d
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发表时间：
2021-03
影响因子：
7.9
通讯作者：
Bouman
中科院分区：
文献类型：
--
作者：
Akiyama Kazunori;Algaba Juan Carlos;Alberdi Antxon;Alef Walter;Anantua Richard;Asada Keiichi;Azulay Rebecca;Baczko Anne-Kathrin;Ball David;Balokovic Mislav;Barrett John;Benson Bradford A.;Bintley Dan;Blackburn Lindy;Blundell Raymond;Bol;Wilfred;Bouman
2017年4月，事件视界望远镜（EHT）观测到了M87星系核心超大质量黑洞周围的近视界区域。这些1.3毫米波长的观测揭示了一个紧凑的不对称环状源形态。这种结构起源于黑洞附近的相对论等离子体产生的同步辐射。在这里，我们提出了相应的线性偏振EHT图像的中心M87。我们发现，只有一部分的环显着极化。分辨的分数线偏振在环的西南部有一个最大值，在那里它上升到大约15%的水平。偏振位置角以接近方位角的图案布置。我们进行定量测量的相关偏振特性的紧凑的排放，并找到证据的极化源结构的时间演变超过一个星期的EHT观测。详细的极化数据减少和校准方法。我们使用多种独立的成像和建模技术进行数据分析，每种技术都针对一套合成数据集进行验证。总偏振结构及其随时间的明显演化对用于重建图像的方法不敏感。这些偏振图像携带有关同步辐射磁场结构的信息。它们的物理解释在一份随附的出版物中讨论。
In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observations revealed a compact asymmetric ring-like source morphology. This structure originates from synchrotron emission produced by relativistic plasma located in the immediate vicinity of the black hole. Here we present the corresponding linear-polarimetric EHT images of the center of M87. We find that only a part of the ring is significantly polarized. The resolved fractional linear polarization has a maximum located in the southwest part of the ring, where it rises to the level of about 15%. The polarization position angles are arranged in a nearly azimuthal pattern. We perform quantitative measurements of relevant polarimetric properties of the compact emission and find evidence for the temporal evolution of the polarized source structure over one week of EHT observations. The details of the polarimetric data reduction and calibration methodology are provided. We carry out the data analysis using multiple independent imaging and modeling techniques, each of which is validated against a suite of synthetic data sets. The gross polarimetric structure and its apparent evolution with time are insensitive to the method used to reconstruct the image. These polarimetric images carry information about the structure of the magnetic fields responsible for the synchrotron emission. Their physical interpretation is discussed in an accompanying publication.
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DOI：
10.1086/118621
发表时间：
1997-09
期刊：
The Astronomical Journal
影响因子：
--
作者：
Z. Shen;T. Wan;J. Moran;D. Jauncey;J. Reynolds;A. Tzioumis;R. Gough;R. Ferris;M. Sinclair
通讯作者：
Z. Shen;T. Wan;J. Moran;D. Jauncey;J. Reynolds;A. Tzioumis;R. Gough;R. Ferris;M. Sinclair
THEMIS：事件视界望远镜的参数估计框架
影响因子：
4.9
作者：
Broderick Avery E.;Gold Roman;Karami Mansour;Preciado-Lopez Jorge A.;Tiede Paul;Pu Hung-Yi;Akiyama Kazunori;Alberdi Antxon;Alef Walter;Asada Keiichi;Azulay Rebecca;Baczko Anne-Kathrin;Balokovic Mislav;Barrett John;Bintley Dan;Blackburn Lindy;Bol;Wilfre
通讯作者：
Wilfre
DOI：
10.1088/2041-8205/783/2/l33
发表时间：
2014-02
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
C. Kuo;K. Asada;R. Rao;M. Nakamura;J. Algaba;H. Liu;M. Inoue;P. Koch;P. Ho;S. Matsushita-S.
通讯作者：
C. Kuo;K. Asada;R. Rao;M. Nakamura;J. Algaba;H. Liu;M. Inoue;P. Koch;P. Ho;S. Matsushita-S.
影响因子：
6.5
作者：
S. Bird;W. Harris;J. Blakeslee;C. Flynn
通讯作者：
S. Bird;W. Harris;J. Blakeslee;C. Flynn
DOI：
10.3847/1538-4357/ab8469
发表时间：
2019-10
期刊：
The Astrophysical Journal
影响因子：
--
作者：
L. Blackburn;D. Pesce;Michael D. Johnson;M. Wielgus;A. Chael;P. Christian;S. Doeleman
通讯作者：
L. Blackburn;D. Pesce;Michael D. Johnson;M. Wielgus;A. Chael;P. Christian;S. Doeleman