Advection-dominated accretion: A self-similar solution
نویسندگان
چکیده
منابع مشابه
Advection-dominated Accretion: a Self-similar Solution
We consider viscous rotating accretion flows in which most of the viscously dissipated energy is stored as entropy rather than being radiated. Such advection-dominated flows may occur when the optical depth is either very small or very large. We obtain a family of self-similar solutions where the temperature of the accreting gas is nearly virial and the flow is quasi-spherical. The gas rotates ...
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When we model black hole accretion sources such as active galactic nuclei and black hole X-ray binaries as advection-dominated accretion flows (ADAFs), it is neccesary to use the global solution to the equations rather than the simpler self-similar solution, since the latter is inaccurate in the region near the black hole where most of the radiation is emitted. However, technically, it is a dif...
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We consider axisymmetric viscous accretion flows where a fraction f of the viscously dissipated energy is stored in the accreting gas as entropy and a fraction 1 − f is radiated. Assuming α-viscosity we obtain a two-parameter family of self-similar solutions. Very few such exact self-consistent solutions are known for viscous differentially rotating flows. When the parameter f is small, that is...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1994
ISSN: 0004-637X,1538-4357
DOI: 10.1086/187381