Engineering topics
Publications and source records attributed to Czerny, B..
Black hole accretion disk models at moderately high accretion rates have been constructed, taking correctly into account dissipation and heat transport in the transonic part of the flow. The present models differ from those of Shakura and Sunyaev (1973) in many important respects. The surface density at a given radius relates to the accretion rate through an S-shaped function.
A two-component model is applied to an X-ray outburst from Aql X-1 recorded by the Einstein Observatory in March-April 1979. The model treats such outbursts as a combination of a soft, multicolor component (accretion disk) and a hard-blackbody component (boundary layer emission). Evaluation of the light curves indicates that the bursts were caused by an increase in the accretion rate. The calculations also suggest that the system observed is inclined at a 33 deg angle.