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General relativistic magnetohydrodynamic simulations of magnetically choked accretion flows around black holes
- J. McKinney, A. Tchekhovskoy, R. Stanford, Princeton
- Physics
- 19 January 2012
Black hole (BH) accretion flows and jets are qualitatively affected by the presence of ordered magnetic fields. We study fully three-dimensional global general relativistic magnetohydrodynamic (MHD)…
Black Hole Spin Evolution
- C. Gammie, S. Shapiro, J. McKinney
- Physics
- 30 October 2003
We consider a subset of the physical processes that determine the spin j ≡ a/M of astrophysical black holes. These include (1) Initial conditions. Recent models suggest that the collapse of a…
HARM: A Numerical Scheme for General Relativistic Magnetohydrodynamics
- C. Gammie, J. McKinney, G. T'oth
- Physics
- 25 January 2003
We describe a conservative, shock-capturing scheme for evolving the equations of general relativistic magnetohydrodynamics. The fluxes are calculated using the Harten, Lax, & van Leer scheme. A…
General relativistic magnetohydrodynamic simulations of the jet formation and large-scale propagation from black hole accretion systems
- J. McKinney
- Physics
- 2 March 2006
The formation and large-scale propagation of Poynting-dominatedjets produced by accreting, rapidly rotating black hole systems are studied by numerically integrating the general relativistic…
Total and Jet Blandford-Znajek Power in the Presence of an Accretion Disk
- J. McKinney
- Physics
- 16 June 2005
Rotating black holes probably power ultrarelativistic jets in gamma-ray bursts, relativistic jets from some active galactic nuclei, and jets from some black hole X-ray binaries. Prior estimates of…
A Measurement of the Electromagnetic Luminosity of a Kerr Black Hole
- J. McKinney, C. Gammie
- Physics
- 26 April 2004
Some active galactic nuclei, microquasars, and gamma-ray bursts may be powered by the electromagnetic braking of a rapidly rotating black hole. We investigate this possibility via axisymmetric…
BLACK HOLE SPIN AND THE RADIO LOUD/QUIET DICHOTOMY OF ACTIVE GALACTIC NUCLEI
- A. Tchekhovskoy, R. Narayan, J. McKinney
- Physics
- 12 November 2009
Radio loud active galactic nuclei (AGNs) are on average 1000 times brighter in the radio band compared to radio quiet AGNs. We investigate whether this radio loud/quiet dichotomy can be due to…
Numerical simulations of super-critical black hole accretion flows in general relativity
- A. Sa̧dowski, R. Narayan, J. McKinney, A. Tchekhovskoy
- Physics
- 22 November 2013
A new general relativistic radiation magnetohydrodynamical code KORAL, is described, which employs the M1 scheme to close the radiation moment equations. The code has been successfully verified…
Primitive Variable Solvers for Conservative General Relativistic Magnetohydrodynamics
- S. Noble, C. Gammie, J. McKinney, L. Del Zanna
- Physics
- 15 December 2005
Conservative numerical schemes for general relativistic magnetohydrodynamics (GRMHD) require a method for transforming between "conserved" variables such as momentum and energy density and…
Simulations of ultrarelativistic magnetodynamic jets from gamma‐ray burst engines
- A. Tchekhovskoy, J. McKinney, Ramesh Narayan Harvard CfAITC, Stanford UniversityKIPAC
- Physics
- 27 March 2008
Long-duration gamma-ray bursts (GRBs) require an engine capable of driving a jet of plasma to ultrarelativistic bulk Lorentz factors of up to several hundred and into narrow opening angles of a few…
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