Electromagnetic Emission from Supermassive Binary Black Holes Approaching Merger

被引：82

作者：

d'Ascoli, Stephane ^{[1
,2
]}

Noble, Scott C. ^{[3
,4
]}

Bowen, Dennis B. ^{[1
]}

Campanelli, Manuela ^{[1
]}

Krolik, Julian H. ^{[5
]}

Mewes, Vassilios ^{[1
]}

机构：

[1] Rochester Inst Technol, Ctr Computat Relat & Gravitat, Rochester, NY 14623 USA

[2] Ecole Normale Super, 24 Rue Lhomond, F-75005 Paris, France

[3] Univ Tulsa, Dept Phys & Engn Phys, Tulsa, OK 74104 USA

[4] NASA, Goddard Space Flight Ctr, Gravitat Astrophys Lab, Code 916, Greenbelt, MD 20771 USA

[5] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 865卷 / 02期

基金：

美国国家科学基金会;

关键词：

accretion; accretion disks; black hole physics; galaxies: nuclei; magnetohydrodynamics (MHD); radiative transfer; MONTE-CARLO CODE; MAGNETOHYDRODYNAMIC SIMULATIONS; SYSTEMATIC SEARCH; ACCRETION DISK; EVOLUTION; TRANSPORT; DYNAMICS; LIGHT;

D O I：

10.3847/1538-4357/aad8b4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first relativistic prediction of the electromagnetic emission from the surrounding gas of a supermassive binary black hole system approaching merger. Using a ray-tracing code to post-process data from a general relativistic 3D magnetohydrodynamic simulation, we generate images and spectra, and analyze the viewing angle dependence of the light emitted. When the accretion rate is relatively high, the circumbinary disk, accretion streams, and mini-disks combine to emit light in the UV/extreme-UV bands. We posit a thermal Compton hard X-ray spectrum for coronal emission; at high accretion rates, it is almost entirely produced in the mini-disks, but at lower accretion rates it is the primary radiation mechanism in the mini-disks and accretion streams as well. Due to relativistic beaming and gravitational lensing, the angular distribution of the power radiated is strongly anisotropic, especially near the equatorial plane.

引用

页数：17

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