SELF-SIMILAR SOLUTIONS OF ADVECTION-DOMINATED ACCRETION FLOWS REVISITED
نویسندگان
چکیده
منابع مشابه
Advection-dominated Accretion Flows: Optically Thin Solutions
General properties of advection-dominated accretion ows are discussed. Special emphasis is given to the optically thin branch of solutions, which has very high ion and electron temperatures and is thermally stable. This solution branch has been applied to a number of low-luminosity accreting black holes. The models have resolved some puzzles and have provided a straightforward explanation of th...
متن کاملAdvection-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 ...
متن کاملA Simplified Solution for Advection Dominated Accretion Flows with Outflow
The existence of outflow in the advection dominated accretion flows has been confirmed by both numerical simulations and observations. The outow models for ADAF have been investigated by several groups with a simple self similar solution. But this solution is inaccurate at the inner regions and can not explain the emitted spectrum of the flow; so, it is necessary to obtain a global solution for...
متن کاملGlobal Dynamics of Advection-dominated Accretion Revisited
We numerically solve the set of dynamical equations describing advectiondominated accretion flows (ADAF) around black holes, using a method similar to that of Chakrabarti (1996a). We choose the sonic radius of the flow Rs and the integration constant in angular momentum equation j as free parameters, and integrate the equations from the sonic point inwards to see if the solution can extend supe...
متن کاملParticle Heating in Advection-dominated Accretion Flows
I review particle heating by MHD turbulence in collision-less plasmas appropriate to advection-dominated accretion flows. These considerations suggest that the preferential turbulent heating of protons assumed by theoretical models is only achieved for relatively subthermal magnetic fields.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Astronomy and Space Sciences
سال: 2005
ISSN: 2093-5587
DOI: 10.5140/jass.2005.22.2.139