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Triggered star formation in expanding shells

S. Ehlerova·J. Palous
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Abstract

We discuss fragmentation processes which induce star formation in dense walls of expanding shells. The influence of the energy input, the ISM scale-height and speed of sound in the ambient medium is tested. We formulate the condition for the gravitational fragmentation of expanding shells: if the total surface density of the disc is higher than a certain critical value, shells are unstable. The value of the critical density depends on the energy of the shell and the sound speed in the ISM.

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S. Ehlerova, J. Palous. 2001-11-27. Triggered star formation in expanding shells. https://doi.org/10.1046/j.1365-8711.2002.05156.x

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