Magnetically-levitating disks around supermassive black holes
Författare
Summary, in English
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.
Avdelning/ar
Publiceringsår
2012
Språk
Engelska
Publikation/Tidskrift/Serie
Astrophysical Journal
Volym
758
Issue
2
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
American Astronomical Society
Ämne
- Astronomy, Astrophysics and Cosmology
Nyckelord
- fields
- magnetic
- ISM: clouds
- accretion disks
- accretion
- Galaxy: nucleus
- magnetohydrodynamics (MHD)
- methods: numerical
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0004-637X