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Incoming links: Charles F. Gammie
Charles F. Gammie Created 2026-10-20 Updated 2026-11-05
Charles F. Gammie studies accretion disks, black holes and computational approaches to their dynamics. His 2001 study used local, razor-thin models to investigate gravitational instability in a cooling astrophysical disk.
The models distinguish two outcomes. Sufficiently slow radiative cooling permits a fluctuating state in which dissipation of turbulence replaces the lost heat; faster cooling permits gravitational fragmentation. The reported transition depends on the local model and its assumptions. Its broader importance is the explicit link between an energy balance and whether a disk transports angular momentum or breaks into bound structures.[ref]
Nonlinear Outcome of Gravitational Instability in Cooling, Gaseous Disks by Charles F. Gammie. Abstract: local razor-thin model, cooling–dissipation balance and the distinction between turbulence and fragmentation
Portrait of Charles F. Gammie
. Source. Nonlinear Outcome of Gravitational Instability in Cooling, Gaseous Disks by Charles F. Gammie Created 2026-10-20 Updated 2026-11-05
By Charles F. Gammie. The2001 local razor-thin cooling model distinguishes self-regulated gravitational turbulence from fragmentation. Its numerical cooling threshold is model-specific; it is not a universal planet-formation constant.