Resistive and magnetized accretion flows with convection
نویسندگان
چکیده
منابع مشابه
Self-Similar Accretion Flows with Convection
We consider height-integrated equations of an advection-dominated accretion flow (ADAF), assuming that there is no mass outflow. We include convection through a mixing length formalism. We seek self-similar solutions in which the angular velocity and sound speed scale as R, where R is the radius, and consider two limiting prescriptions for the transport of angular momentum by convection. In one...
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We study how axisymmetric magnetohydrodynamical (MHD) accretion flows depend on γ adiabatic index in the polytropic equation of state. This work is an extension of Mościbrodzka & Proga (2008), where we investigated the γ dependence of 2-D Bondilike accretion flows in the hydrodynamical (HD) limit. Our main goal is to study if simulations for various γ can give us insights into to the problem of...
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Transonic accretion flow with self-consistent treatment of the magnetic field is presented. My website http://www.cfa.harvard.edu/~rshcherb/.
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Radiatively inefficient accretion flows onto black holes are unstable due to both an outwardly decreasing entropy (“convection”) and an outwardly decreasing rotation rate (the “magnetorotational instability”, MRI). Using a linear magnetohydrodynamic stability analysis, we show that long-wavelength modes with λ/H ≫ β are primarily destabilized by the entropy gradient and that such “convective” m...
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For small values of the dimensionless viscosity parameter, namely α ∼< 0.1, the dynamics of non-radiating accretion flows is dominated by convection; convection strongly suppresses the accretion of matter onto the central object and transports a luminosity ∼ 10 − 10Ṁc from small to large radii in the flow. A fraction of this convective luminosity is likely to be radiated at large radii via ther...
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ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2012
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-012-1081-y