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Stability of Relativistic Jets from Rotating, Accreting Black Holes via Fully Three-Dimensional Magnetohydrodynamic Simulations
Jonathan C. McKinney, Roger D. Blandford
Rotating magnetized compact objects and their accretion discs can generate strong toroidal magnetic fields driving highly magnetized plasmas into relativistic jets. Of significant…
Three-Dimensional Simulations of Magnetized Thin Accretion Disks around Black Holes: Stress in the Plunging Region
Rebecca Shafee, Jonathan C. McKinney, Ramesh Narayan +3
We describe three-dimensional general relativistic magnetohydrodynamic simulations of a geometrically thin accretion disk around a non-spinning black hole. The disk has a thickness…
Simulations of Ultrarelativistic Magnetodynamic Jets from Gamma-ray Burst Engines
Alexander Tchekhovskoy, Jonathan C. McKinney, Ramesh Narayan
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 openin…
WHAM: A WENO-based general relativistic numerical scheme I: Hydrodynamics
Alexander Tchekhovskoy, Jonathan C. McKinney, Ramesh Narayan
Active galactic nuclei, x-ray binaries, pulsars, and gamma-ray bursts are all believed to be powered by compact objects surrounded by relativistic plasma flows driving phenomena su…
Equation of State in Relativistic Magnetohydrodynamics: variable versus constant adiabatic index
A. Mignone, Jonathan C. McKinney
The role of the equation of state for a perfectly conducting, relativistic magnetized fluid is the main subject of this work. The ideal constant -law equation of state, commonly…
Self-Similar Force-Free Wind From an Accretion Disk
Ramesh Narayan, Jonathan C. McKinney, Alison J. Farmer
We consider a self-similar force-free wind flowing out of an infinitely thin disk located in the equatorial plane. On the disk plane, we assume that the magnetic stream function $P…
Disk-Jet Coupling in Black Hole Accretion Systems II: Force-Free Electrodynamical Models
Jonathan C. McKinney, Ramesh Narayan
In paper I, we showed that time-dependent general relativistic magnetohydrodynamic (GRMHD) numerical models of accretion disks, although being highly turbulent, have surprisingly s…
Disk-Jet Coupling in Black Hole Accretion Systems I: General Relativistic Magnetohydrodynamical Models
Jonathan C. McKinney, Ramesh Narayan
General relativistic numerical simulations of magnetized accretion flows around black holes show a disordered electromagnetic structure in the disk and corona and a highly relativi…
General Relativistic Magnetohydrodynamic Simulations of Jet Formation and Large-Scale Propagation from Black Hole Accretion Systems
Jonathan C. McKinney
The formation and large-scale propagation of Poynting-dominated jets produced by accreting, rapidly rotating black hole systems are studied by numerically integrating the general r…
Relativistic Force-Free Electrodynamic Simulations of Neutron Star Magnetospheres
Jonathan C. McKinney
The luminosity and structure of neutron star magnetospheres are crucial to our understanding of pulsar and plerion emission. A solution found using the force-free approximation wou…
General Relativistic Force-Free Electrodynamics: A New Code and Applications to Black Hole Magnetospheres
Jonathan C. McKinney
The force-free limit of magnetohydrodynamics (MHD) is often a reasonable approximation to model black hole and neutron star magnetospheres. We describe a general relativistic force…
Primitive Variable Solvers for Conservative General Relativistic Magnetohydrodynamics
Scott C. Noble, Charles F. Gammie, Jonathan C. McKinney +1
Conservative numerical schemes for general relativistic magnetohydrodynamics (GRMHD) require a method for transforming between ``conserved'' variables such as momentum and energy d…
Total and Jet Blandford-Znajek Power in Presence of Accretion Disk
Jonathan C. McKinney
A rotating black hole probably powers ultrarelativistic jets in gamma-ray bursts, relativistic jets from some active galactic nuclei, and jets from some black hole x-ray binaries.…
Jet Formation in Black Hole Accretion Systems II: Numerical Models
Jonathan C. McKinney
In a companion theory paper, we presented a unified model of jet formation. We suggested that primarily two types of relativistic jets form near accreting black holes: a potentiall…
Jet Formation in Black Hole Accretion Systems I: Theoretical Unification Model
Jonathan C. McKinney
Two types of relativistic jets are suggested to form near accreting black holes: a potentially ultrarelativistic Poynting-dominated jet and a Poynting-baryon jet. One source of jet…
A Measurement of the Electromagnetic Luminosity of a Kerr Black Hole
Jonathan C. McKinney, Charles F. Gammie
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…
Anisotropy of Magnetohydrodynamic Turbulence and the Polarized Spectra of OH Masers
William D. Watson, Dmitri S. Wiebe, Jonathan C. McKinney +1
We consider astrophysical maser radiation that is created in the presence of mildly supersonic, magnetohydrodynamic (MHD) turbulence. The focus is on the OH masers for which the ma…
Black Hole Spin Evolution
Charles F. Gammie, Stuart L. Shapiro, Jonathan C. McKinney
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 c…
HARM: A Numerical Scheme for General Relativistic Magnetohydrodynamics
Charles F. Gammie, Jonathan C. McKinney, Gábor Tóth
We describe a conservative, shock-capturing scheme for evolving the equations of general relativistic magnetohydrodynamics. The fluxes are calculated using the Harten, Lax, and van…
Numerical Models of Viscous Accretion Flows Near Black Holes
Jonathan C. McKinney, Charles F. Gammie
We report on a numerical study of viscous fluid accretion onto a black hole. The flow is axisymmetric and uses a pseudo-Newtonian potential to model relativistic effects near the e…