Accretion Disks and Magnetic Fields
نویسندگان
چکیده
منابع مشابه
Accretion Disks in Large-scale Magnetic Fields
This paper presents a survey of a set of simulations of accretion disks orbiting a rapidly rotating Kerr black hole and embedded in a large-scale initial magnetic field. Each simulation uses a common state for the initial torus, including an MRI seed-field consisting of poloidal loops along isodensity contours, and differ only in the strength of the initial large-scale magnetic field in relatio...
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Accretion disk theory was first developed as a theory with the local heat balance, where the whole energy produced by a viscous heating was emitted to the sides of the disk. One of the most important new invention of this theory was the phenomenological treatment of the turbulent viscosity , known the " alpha " prescription, where the (rφ) component of the stress tensor was approximated by (αp)...
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Large scale magnetic field threading an accretion disk is a key ingredient in the jet formation model. The most attractive scenario for the origin of such a large scale field is the advection of the field by the gas in the accretion disk from the interstellar medium or a companion star. However, it is realized that outward diffusion of the accreted field is fast compared to the inward accretion...
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ژورنال
عنوان ژورنال: Europhysics News
سال: 1988
ISSN: 0531-7479,1432-1092
DOI: 10.1051/epn/19881911142