Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...302...99a&link_type=abstract
Astronomy and Astrophysics, v.302, p.99
Astronomy and Astrophysics
Astrophysics
7
Accretion Disks, Black Holes, Nucleosynthesis, X-Rays: Stars
Scientific paper
We construct stationary models of a slim accretion disk with including hydrogen burning. Energy generation through the CNO cycle is explicitly incorporated into the equations of structure. Viscous torque is prescribed in term of an α parameter and mass accretion rate is set to be supercritical. When enough energy is generated by hydrogen burning, the disk expands vertically to the equatorial plane. More work is done by pressure than the net energy generated, causing temperature to decrease. It is a typical character of a gravitating system which has negative heat capacity. Hydrogen burning is operated through the CNO and hot CNO cycles. A significant amounts of ^14^O and ^15^O are formed inside the disk. The nuclear energry release is comparable to the energy generated by viscous dissipation and has significantly important contributions to the energy balance inside the disk when α is less than 10^-5^, because temperature scales as T~α^-1/4^ in our models of radiation pressure dominated disks.
Arai Kensuke
Hashimoto Makoto
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