Magnetically-levitating disks around supermassive black holes
(2012) In Astrophysical Journal 758(2).- 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... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3276215
- author
- Gaburov, Evghenii ; Johansen, Anders LU and Levin, Yuri
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- fields, magnetic, ISM: clouds, accretion disks, accretion, Galaxy: nucleus, magnetohydrodynamics (MHD), methods: numerical
- in
- Astrophysical Journal
- volume
- 758
- issue
- 2
- article number
- 103
- publisher
- American Astronomical Society
- external identifiers
-
- wos:000310562000032
- scopus:84867324459
- ISSN
- 0004-637X
- DOI
- 10.1088/0004-637X/758/2/103
- language
- English
- LU publication?
- yes
- id
- 7af9e3d8-15b6-4863-8b23-6448bada99ed (old id 3276215)
- alternative location
- http://arxiv.org/abs/1201.4873
- date added to LUP
- 2016-04-01 14:30:58
- date last changed
- 2024-04-10 20:51:47
@article{7af9e3d8-15b6-4863-8b23-6448bada99ed,
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.}},
author = {{Gaburov, Evghenii and Johansen, Anders and Levin, Yuri}},
issn = {{0004-637X}},
keywords = {{fields; magnetic; ISM: clouds; accretion disks; accretion; Galaxy: nucleus; magnetohydrodynamics (MHD); methods: numerical}},
language = {{eng}},
number = {{2}},
publisher = {{American Astronomical Society}},
series = {{Astrophysical Journal}},
title = {{Magnetically-levitating disks around supermassive black holes}},
url = {{http://dx.doi.org/10.1088/0004-637X/758/2/103}},
doi = {{10.1088/0004-637X/758/2/103}},
volume = {{758}},
year = {{2012}},
}