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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We consider supercritical accretion onto a compact object when the accretion rate exceeds its value derived from the Eddington limit: Mdot$_Edd$ = L$_Edd$/c\^2. We use the scenario that was proposed by Shakura and Sunyaev (1973) for the supercritical regime, according to which matter flows out of the gas-disk surface under radiation pressure. An analytic solution of the accretion-disk structure is obtained for this scenario by using classical equations. For the first time, an attempt is made to construct a model for nonconservative supercritical accretion with advection. To this end, we develop a numerical scheme for calculating the structure of an advective disk with mass outflow. The goal of solving the problem of a supercritical disk with mass loss is to explain accreting sources with outflowing envelopes, for example, SS433 and galactic nuclei. The structure and observational manifestations of the envelope which forms around a supercritical disk are considered by taking into account bremsstrahlung absorption and Thomson scattering of photons.