Statistics – Computation
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...216..230h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 216, no. 1-2, June 1989, p. 230-244. Research supported by the Universite de P
Statistics
Computation
29
Accretion Disks, Coronas, Magnetohydrodynamic Turbulence, Magnetohydrodynamics, Active Galactic Nuclei, Astronomical Models, Computational Astrophysics, Coronal Loops, X Ray Sources
Scientific paper
MHD stresses are used to model a thin disk dynamically interacting with a self-created magnetic corona. A simple model of the coronal magnetic structure produced by the turbulent MHD relaxation of the stresses exerted by the disk's differential rotation can explain the effect of coronal heating and the back reaction of the corona on the energy balance and angular momentum flow in the disk. The results show the disk to acquire a non-Keplerian rotation profile, with the trailing foot point of the magnetic loops being accelerated, and the leading one being decelerated, in comparison to a Keplerian distribution. It is found that the coronal heating and non-Keplerian effects are weak when the coronal scale becomes much larger than the disk size.
Heyvaerts Jean F.
Priest Eric R.
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