Linear and Nonlinear Instabilities in Cooling Sheets

Details Linear and Nonlinear Instabilities in Cooling Sheets Linear and Nonlinear Instabilities in Cooling Sheets

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21115302v&link_type=abstract

American Astronomical Society, AAS Meeting #211, #153.02; Bulletin of the American Astronomical Society, Vol. 39, p.1004

Astronomy and Astrophysics

Astronomy

Scientific paper

Star formation in the interstellar medium is thought to proceed through the development of dense cold layers in a heterogeneous environment. We have examined the formation of such layers and find that under general conditions they are subject to linear and nonlinear transverse instabilities which produce rotating fragments. The nonlinear stage of evolution is closely related to the Nonlinear Thin Shell Instability, present in shock-confined slabs. However, in this case the instability arises without confining shocks. Moreover the early stages of linear growth are driven by a novel linear instability. We present analytical and numerical results which suggest that both these mechanisms are very general.

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