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Nonlinear Criterion for the Stability of Molecular Clouds
Ruben Krasnopolsky, Charles F. Gammie
Dynamically significant magnetic fields are routinely observed in molecular clouds, with mass-to-flux ratio lambda = (2 pi sqrt{G}) (Sigma/B) ~ 1 (here Sigma is the total column de…
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…
Nonlinear Stability of Thin, Radially-Stratified Disks
Bryan M. Johnson, Charles F. Gammie
We perform local numerical experiments to investigate the nonlinear stability of thin, radially-stratified disks. We demonstrate the presence of radial convective instability when…
Linear Theory of Thin, Radially-Stratified Disks
Bryan M. Johnson, Charles F. Gammie
We consider the nonaxisymmetric linear theory of radially-stratified disks. We work in a shearing-sheet-like approximation, where the vertical structure of the disk is neglected, a…