Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20513918h&link_type=abstract
American Astronomical Society Meeting 205, #139.18; Bulletin of the American Astronomical Society, Vol. 36, p.1576
Astronomy and Astrophysics
Astronomy
Scientific paper
Hydrodynamical instabilities are key processes in the ISM. Interacting clouds and flows give rise to complex structures and may fuel star formation. Previously, we have examined the self-gravity driven interfacial instability (SGI), which acts upon a density interface, and contrasted its behavior to that of the Rayleigh-Taylor (RT) instability. We now continue our study by coupling the two instabilities. As a first step, we develop and test a solution to the equation of hydrostatic equilibrium when both self-gravity and a global, constant acceleration are present. The result is a pressure distribution with a non-zero gradient at the interface. We use numerical simulations to test the equilibrium solution and model the evolution of perturbed interfaces.
Hueckstaedt Robert M.
Hunter James H. Jr.
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