Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...158..297b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 158, no. 1-2, April 1986, p. 297-304.
Astronomy and Astrophysics
Astronomy
8
Accretion Disks, Black Holes (Astronomy), Galactic Nuclei, Molecular Clouds, Seyfert Galaxies, Spiral Galaxies, Angular Momentum, Galactic Structure, Hydrodynamics, Luminosity, Milky Way Galaxy
Scientific paper
Episodic activity in galactic nuclei may be the result of an encounter between an interstellar cloud and a massive black hole. The present paper describes two dimensional hydrodynamical calculations of cloud-hole encounters in the limits of clouds larger than and comparable to the accretion radius. For large clouds the total mass accreted and the accretion time scale is shown to be simply related to initial density and velocity gradients in the cloud. Seyfert luminosities (greater than 10 to the 43th erg/s) can be achieved for time scales of 10 to the 5th - 10 to the 7th yr. For small clouds, the captured material develops a complex structure on the scale of the accretion radius. The structure bears a resemblance to the morphology of the ionized gas in the central two parsecs of the Galaxy; however, the gas velocity field does not reproduce in detail the observed kinematics of the ionized gas in this region.
Bottema Roelof
Sanders Robert H.
No associations
LandOfFree
Episodic accretion onto massive black holes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Episodic accretion onto massive black holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Episodic accretion onto massive black holes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1101090