273 citations · 2.1k across the 30 of their papers we have counts for
7 papers · 1 filter
Simulations of Magnetorotational Turbulence with a Higher-Order Godunov Scheme
Jacob B. Simon, John F. Hawley, Kris Beckwith
(abridged) We apply a second-order Godunov code, Athena, to studies of the magnetorotational instability using unstratified shearing box simulations with a uniform net vertical fie…
Where is the Radiation Edge in Magnetized Black Hole Accretion discs?
Kris Beckwith, John Hawley, Julian Krolik
General Relativistic (GR) Magnetohydrodynamic (MHD) simulations of black hole accretion find significant magnetic stresses near and inside the innermost stable circular orbit (ISCO…
The Influence of Magnetic Field Geometry on the Evolution of Black Hole Accretion Flows: Similar Disks, Drastically Different Jets
Kris Beckwith, John F. Hawley, Julian H. Krolik
Because the magneto-rotational instability is capable of exponentially amplifying weak preexisting magnetic fields, it might be hoped that the character of the magnetic field in ac…
Estimating the Radiative Efficiency of Magnetized Accretion Disks Around Black Holes
Kris Beckwith, John F. Hawley, Julian H. Krolik
Simulations of black hole accretion have shown that magnetic stresses are present near and inside the innermost stable circular orbit (ISCO). This finding suggests that such flows…
Extreme Gravitational Lensing near Rotating Black Holes
Kris Beckwith, Chris Done
We describe a new approach to calculating photon trajectories and gravitational lensing effects in the strong gravitational field of the Kerr black hole. These techniques are appli…
Accurate Modelling of Relativistic Iron Lines from Accretion Discs
Kris Beckwith, Chris Done
Observations of fluorescent iron lines from accreting black holes provide one of the best tests of strong field gravity available to date, and the only current observational tool t…