Mass Outflow Rate From Advective Accretion Disks around Compact Objects
نویسندگان
چکیده
We compute mass outflow rates from advective accretion disks around compact objects, such as neutron stars and black holes. These computations, for the first time, are done using combinations of exact transonic inflow and outflow solutions which may or may not form standing shock waves. Assuming that the bulk of the outflow is from the effective boundary layers of these objects, we find that the ratio of the outflow rate and inflow rate varies anywhere from a few percent to even close to a hundred percent or more (disk evacuation case) depending on the initial parameters of the disk, the degree of compression of matter near the centrifugal barrier, and the polytropic index of the flow. Our result, in general, matches with the outflow rates obtained through a fully time-dependent numerical simulation and point out to non-steady behavior which may evacuate the disk and produce quiescence states. Subject headings: black holes — neutron stars– stars: accretion —stars:winds — shocks waves —jets — AGN — quasars Submitted to Astrophysical Journal on April 19th, 1998; Final revised version submitted on September 9th, 1998
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