Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988acaps...8....1l&link_type=abstract
(Acta Astrophysica Sinica, vol. 8, 1988, p. 1-13) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 12, June 1988, p. 11
Astronomy and Astrophysics
Astrophysics
13
Astrophysics, Black Holes (Astronomy), Oscillating Flow, Stellar Mass Accretion, Equations Of Motion, Subsonic Flow, Supersonic Flow, Transonic Flow
Scientific paper
The possibility that a simple and widely applicable mechanism responsible for the light variability displayed by black holes may exist is examined on the basis of the bimodal character of black hole accretion. Equations for a stationary, adiabatic accretion flow are applied to black holes. The two modes of accretion for a nonrotating black hole are discussed: the quasi-spherical mode in which both the rotational and relativistic effects are negligible in the transonic part, and the disk-type mode in which they are dominant. It is shown that transition between the two modes is based on a discontinuous jump in the location of the sonic point and is caused by a continuous change in the flow parameter. It is suggested that a time-dependent accretion flow would oscillate between the two modes, exhibiting a quasi-periodic or chaotic behavior which could explain the luminosity variability of AGNs and Cyg X-1, providing observational support for the existence of black holes.
Abramowicz Marek A.
Lu Jufu
No associations
LandOfFree
Bimodal character of black hole accretion 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 Bimodal character of black hole accretion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bimodal character of black hole accretion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1176703