Other
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..238..417n&link_type=abstract
Black Holes from Stars to Galaxies -- Across the Range of Masses. Edited by V. Karas and G. Matt. Proceedings of IAU Symposium #
Other
Scientific paper
We simulate the accretion disk evaporation to study the nature of spectral transitions in the black hole binaries. We perform 2 dimensional magnetohydrodynamical simulations with heat conduction by electrons. We assume axisymmetric accretion disks. We put cold gas torus in hot hydrostatic halo. Weak magnetic fields are initially threaded vertically. Self-gravity and magnetic resistivity are neglected. We use the numerical codes set "CANS "(Coordinated Astronomical Numerical Software). Heat conduction equation and MHD equations are solved separately according to time splitting method. We adopt Lax-Wendroff method for the MHD part and BiCG stabilized method for heat conduction part. We set an absorbing inner boundary condition. We obtain the result that the hot gas emanates from the disk, since there is the heat flow from hot halo to cool accretion disk. Near central objects, the mass flow rate is large. In inner region the corona gas falls to black hole, otherwise in outer region that goes to far from black hole.
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