ACCRETION DISK MODELS WITH HYDROGEN BURNING AROUND A BLACK-HOLE

We construct stationary models of a slim accretion disk with including hydrogen burning. Energy generation through the CNO cycle is explicit ly incorporated into the equations of structure. Viscous torque is pre scribed in term of an a parameter and mass accretion rate is set to be supercritical. When enough energy is generated by hydrogen burning, t he disk expands vertically to the equatorial plane. More work is done by pressure than the net energy generated, causing temperature to decr ease. It is a typical character of a gravitating system which has nega tive heat capacity. Hydrogen burning is operated through the CNO and h ot CNO cycles. A significant amounts of O-14 and O-15 are formed insid e the disk. The nuclear energry release is comparable to the energy ge nerated by viscous dissipation and has significantly important contrib utions to the energy balance inside the disk when alpha is less than 1 0(-5), because temperature scales as T similar to alpha(-1/4) in our m odels of radiation pressure dominated disks.