DISK-OUTFLOW COUPLING: ENERGETICS AROUND SPINNING BLACK HOLES
نویسندگان
چکیده
منابع مشابه
Dynamics and Energetics of Turbulent, Magnetized Disk Accretion around Black Holes: a First-principles Approach to Disk–corona–outflow Coupling
We present an analytic description of turbulent, magnetohydrodynamic (MHD) disk accretion around black holes that specifically addresses the relationship between radial and vertical, mean-field transport of mass, momentum and energy, thereby complementing and extending numerical simulations. The azimuthal-vertical component of the magnetic stress is fundamental to an understanding of disk– coro...
متن کاملMini-discs around spinning black holes
Accretion onto black holes in wind-fed binaries and in collapsars forms small rotating discs with peculiar properties. Such “mini-discs” accrete on the free-fall time without help of viscosity and nevertheless can have a high radiative efficiency. The inviscid mini-disc model was previously constructed for a non-rotating black hole. We extend the model to the case of a spinning black hole, calc...
متن کاملSpinning Black Hole Energetics
We discuss black hole energy processes that could serve as the mechanism for relativistic jets. The energy-extraction process of Roger Penrose is presented. The existence of the negative energy region is derived from the extreme Kerr metric. Theoretical limits on the efficiency of the process are discussed. An analogous process for a Kerr-Newman hole is presented. The Blandford-Znajek process i...
متن کاملDisk Emission from Magneto-hydrodynamic Simulations of Spinning Black Holes
We present the results of a new series of global 3D relativistic magnetohydrodynamic (MHD) simulations of thin accretion disks around spinning black holes. The disks have aspect ratios of H/R ∼ 0.05 and spin parameters a/M = 0, 0.5, 0.9, and 0.99. Using the ray-tracing code Pandurata, we generate broad-band thermal spectra and polarization signatures from the MHD simulations. We find that the s...
متن کاملEfficiency of Neutrino Annihilation around Spinning Black Holes
A fraction of neutrino emission from GRB accretion disks annihilates above the disk, creating e+plasma that can drive GRB explosions. We calculate the efficiency of this annihilation using the recent detailed model of hyper-accretion disks around Kerr black holes. Our calculation is fully relativistic and based on a geodesic-tracing method. We find that the efficiency is a well-defined function...
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: The Astrophysical Journal
سال: 2010
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/713/1/105