AGN Accretion Disks with Finite Turbulent Prandtl Number
نویسندگان
چکیده
منابع مشابه
On the Magnetic Prandtl Number Behavior of Accretion Disks
We investigate the behavior of the magnetic Prandtl number (ratio of microscopic viscosity to resistivity) for accretion sources. Generally this number is very small in standard accretion disk models, but can become larger than unity within ∼ 50 Schwarzschild radii of the central mass. Recent numerical investigations suggest a marked dependence of the level of MHD turbulence on the value of the...
متن کاملThe Turbulent Magnetic Prandtl Number of MHD Turbulence in Disks
The magnetic Prandtl number PrM is the ratio of viscosity to resistivity. In astrophysical disks the diffusion of angular momentum (viscosity) and magnetic fields (resistivity) are controlled by turbulence. Phenomenological models of the evolution of large scale poloidal magnetic fields in disks suggest that the turbulent magnetic Prandtl number PrM,T controls the rate of escape of vertical fie...
متن کاملContinuum Reverberation Mapping of AGN Accretion Disks
Department of Astronomy, Ohio State University, Columbus, OH, United States, MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA, United States, Center for Cosmology and AstroParticle Physics, Ohio State University, Columbus, OH, United States, 4 Space Telescope Science Institute, Baltimore, MD, United States, 5 SUPA Physics and Astronomy, University of St. Andrews, Scotland,...
متن کاملTurbulent Comptonization in Relativistic Accretion Disks
Turbulent Comptonization, a potentially important damping and radiation mechanism in relativistic accretion flows, is discussed. Particular emphasis is placed on the physical basis, relative importance, and thermodynamics of turbulent Comptonization. The effects of metal-absorption opacity on the spectral component resulting from turbulent Comptonization is considered as well. 1. Overview of Th...
متن کاملThe Role of Thermal Conduction in Accretion Disks with Outflows
In this work we solve the set of hydrodynamical equations for accretion disks in the spherical coordinates (r,θ,ϕ) to obtain the explicit structure along θ direction. We study a two-dimensional advective accretion disc in the presence of thermal conduction. We find self-similar solutions for an axisymmetric, rotating, steady, viscous-resistive disk. We show that the global structure of an advec...
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: Symposium - International Astronomical Union
سال: 1994
ISSN: 0074-1809
DOI: 10.1017/s0074180900176582