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Title: MAGNETICALLY LEVITATING ACCRETION DISKS AROUND SUPERMASSIVE BLACK HOLES

Abstract

In this paper, we report on the formation of magnetically levitating accretion disks around supermassive black holes (SMBHs). The structure of these disks is calculated by numerically modeling tidal disruption of magnetized interstellar gas clouds. We find that the resulting disks are entirely supported by the pressure of the magnetic fields against the component of gravitational force directed perpendicular to the disks. The magnetic field shows ordered large-scale geometry that remains stable for the duration of our numerical experiments extending over 10% of the disk lifetime. Strong magnetic pressure allows high accretion rate and inhibits disk fragmentation. This in combination with the repeated feeding of magnetized molecular clouds to an SMBH yields a possible solution to the long-standing puzzle of black hole growth in the centers of galaxies.

Authors:
 [1];  [2];  [3]
  1. Centre for Interdisciplinary Exploration and Research in Astrophysics, Northwestern University, 2131 Tech Drive, Evanston, IL 60208 (United States)
  2. Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, Box 43, SE-221 00 Lund (Sweden)
  3. School of Physics and Monash Center for Astrophysics, Monash University, Clayton, VIC 3800 (Australia)
Publication Date:
OSTI Identifier:
22086514
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 758; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; BLACK HOLES; COMPUTERIZED SIMULATION; FRAGMENTATION; GALAXIES; GALAXY NUCLEI; INTERSTELLAR GRAINS; LIFETIME; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS

Citation Formats

Gaburov, Evghenii, Johansen, Anders, and Levin, Yuri. MAGNETICALLY LEVITATING ACCRETION DISKS AROUND SUPERMASSIVE BLACK HOLES. United States: N. p., 2012. Web. doi:10.1088/0004-637X/758/2/103.
Gaburov, Evghenii, Johansen, Anders, & Levin, Yuri. MAGNETICALLY LEVITATING ACCRETION DISKS AROUND SUPERMASSIVE BLACK HOLES. United States. doi:10.1088/0004-637X/758/2/103.
Gaburov, Evghenii, Johansen, Anders, and Levin, Yuri. Sat . "MAGNETICALLY LEVITATING ACCRETION DISKS AROUND SUPERMASSIVE BLACK HOLES". United States. doi:10.1088/0004-637X/758/2/103.
@article{osti_22086514,
title = {MAGNETICALLY LEVITATING ACCRETION DISKS AROUND SUPERMASSIVE BLACK HOLES},
author = {Gaburov, Evghenii and Johansen, Anders and Levin, Yuri},
abstractNote = {In this paper, we report on the formation of magnetically levitating accretion disks around supermassive black holes (SMBHs). The structure of these disks is calculated by numerically modeling tidal disruption of magnetized interstellar gas clouds. We find that the resulting disks are entirely supported by the pressure of the magnetic fields against the component of gravitational force directed perpendicular to the disks. The magnetic field shows ordered large-scale geometry that remains stable for the duration of our numerical experiments extending over 10% of the disk lifetime. Strong magnetic pressure allows high accretion rate and inhibits disk fragmentation. This in combination with the repeated feeding of magnetized molecular clouds to an SMBH yields a possible solution to the long-standing puzzle of black hole growth in the centers of galaxies.},
doi = {10.1088/0004-637X/758/2/103},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 758,
place = {United States},
year = {2012},
month = {10}
}