How Spatially Resolved Polarimetry Informs Black Hole Accretion Flow Models

被引：39

作者：

Ricarte, Angelo ^{[1
,2
]}

Johnson, Michael D. ^{[1
,2
]}

Kovalev, Yuri Y. ^{[3
,4
,5
]}

Palumbo, Daniel C. M. ^{[1
,2
]}

Emami, Razieh ^{[1
]}

机构：

[1] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[2] Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA

[3] Max Planck Inst Radioastron, 3Max Planck, Hugel 69, D-53121 Bonn, Germany

[4] Lebedev Phys Inst Russian Acad Sci, Leninsky Prospekt 53, Moscow 119991, Russia

[5] Moscow Inst Phys & Technol, Inst Sky per 9, Dolgoprudnyi 141700, Russia

来源：

GALAXIES | 2023年 / 11卷 / 01期

基金：

美国国家科学基金会; 俄罗斯科学基金会;

关键词：

interferometry; polarimetry; black holes; magnetohydrodynamics; radiative transfer; accretion; Messier; 87; Sagittarius A*; SAGITTARIUS-A-ASTERISK; M87 EVENT HORIZON; MAGNETIC-FIELD STRUCTURE; TELESCOPE RESULTS. I; GRMHD SIMULATIONS; FARADAY-ROTATION; POLARIZED RADIATION; SHADOW; ENERGY; JETS;

D O I：

10.3390/galaxies11010005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Event Horizon Telescope (EHT) Collaboration has successfully produced images of two supermassive black holes, enabling novel tests of black holes and their accretion flows on horizon scales. The EHT has so far published total intensity and linear polarization images, while upcoming images may include circular polarization, rotation measure, and spectral index, each of which reveals different aspects of the plasma and space-time. The next-generation EHT (ngEHT) will greatly enhance these studies through wider recorded bandwidths and additional stations, leading to greater signal-to-noise, orders of magnitude improvement in dynamic range, multi-frequency observations, and horizon-scale movies. In this paper, we review how each of these different observables informs us about the underlying properties of the plasma and the spacetime, and we discuss why polarimetric studies are well-suited to measurements with sparse, long-baseline coverage.

引用

页数：16

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