Monthly Notices of the Royal Astronomical Society, ( ISI ), Volume (1), No (381), Year (2007-9) , Pages (159-170)

Title : ( Self-similar solutions of viscous–resistive advection-dominated accretion flows with poloidal magnetic fields )

Authors: Jamshid Ghanbari , fatemeh Salehi yekta , Shahram Abbassi ,

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Abstract

We carry out self-similar solutions of viscous–resistive accretion flows around a magnetized compact object. We consider an axisymmetric, rotating, isothermal steady accretion flow, which contains a poloidal magnetic field of the central star. The dominant mechanism of energy dissipation is assumed to be the turbulence viscosity and magnetic diffusivity due to the magnetic field of the central star.We explore the effect of viscosity on a rotating disc in the presence of constant magnetic diffusivity.We show that the dynamical quantities of advectiondominated accretion flows (ADAFs) are sensitive to the advection and viscosity parameters. An increase of the α coefficient in the α-prescription model decreases the radial velocity and increases the density of the flow. It also affects the poloidal magnetic field considerably

Keywords

, accretion, accretion discs – MHD – magnetic fields
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@article{paperid:1038770,
author = {Ghanbari, Jamshid and Fatemeh Salehi Yekta and Abbassi, Shahram},
title = {Self-similar solutions of viscous–resistive advection-dominated accretion flows with poloidal magnetic fields},
journal = {Monthly Notices of the Royal Astronomical Society},
year = {2007},
volume = {1},
number = {381},
month = {September},
issn = {0035-8711},
pages = {159--170},
numpages = {11},
keywords = {accretion; accretion discs – MHD – magnetic fields},
}

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%0 Journal Article
%T Self-similar solutions of viscous–resistive advection-dominated accretion flows with poloidal magnetic fields
%A Ghanbari, Jamshid
%A Fatemeh Salehi Yekta
%A Abbassi, Shahram
%J Monthly Notices of the Royal Astronomical Society
%@ 0035-8711
%D 2007

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