155 citations · 505 across the 8 of their papers we have counts for
8 papers
Field Aligned Currents and Auroral Precipitation During the Terrestrial Alfven Wing State
Brandon Burkholder, Li-Jen Chen, Kareem Sorathia +3
When sub-Alfvénic (Alfvén Mach number MA < 1) plasmas impact Earth, Alfvén wings (AWs) develop. A Multiscale Atmosphere Geospace Environment (MAGE) simulation of the April 2023 sto…
How Jupiter's Unusual Magnetospheric Topology Structures Its Aurora
Binzheng Zhang, Peter A. Delamere, Zhonghua Yao +10
Jupiter's bright persistent polar aurora and Earth's dark polar region indicate that the planets' magnetospheric topologies are very different. High-resolution global simulations s…
GAMERA: A three-dimensional finite-volume MHD solver for non-orthogonal curvilinear geometries
Binzheng Zhang, Kareem A. Sorathia, John G. Lyon +3
Efficient simulation of plasmas in various contexts often involves the use of meshes that conform to the intrinsic geometry of the system under consideration. We present here a des…
MHD Simulation of a Disk Subjected to Lense-Thirring Precession
Kareem A. Sorathia, Julian H. Krolik, John F. Hawley
When matter orbits around a central mass obliquely with respect to the mass's spin axis, the Lense-Thirring effect causes it to precess at a rate declining sharply with radius. Eve…
Relaxation of Warped Disks: the Case of Pure Hydrodynamics
Kareem A. Sorathia, Julian H. Krolik, John F. Hawley
Orbiting disks may exhibit bends due to a misalignment between the angular momentum of the inner and outer regions of the disk. We begin a systematic simulational inquiry into the…
Global Simulations of Accretion Disks I: Convergence and Comparisons with Local Models
Kareem A. Sorathia, Christopher S. Reynolds, James M. Stone +1
Grid-based magnetohydrodynamic (MHD) simulations have proven invaluable for the study of astrophysical accretion disks. However, the fact that angular momentum transport in disks i…
Low-Frequency Oscillations in Global Simulations of Black Hole Accretion
Sean M. O'Neill, Christopher S. Reynolds, M. Coleman Miller +1
We have identified the presence of large-scale, low-frequency dynamo cycles in a long-duration, global, magnetohydrodynamic (MHD) simulation of black hole accretion. Such cycles ha…
Connections Between Local and Global Turbulence in Accretion Disks
Kareem A. Sorathia, Christopher S. Reynolds, Philip J. Armitage
We analyze a suite of global magnetohydrodynamic (MHD) accretion disk simulations in order to determine whether scaling laws for turbulence driven by the magnetorotational instabil…