A Prediction for the Superbubble Size Distribution

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Superbubbles created by the stellar winds and supernovae of OB associations are presumed to grow according to the simple analytical expression R~(L/n)(1/5}t({3/5)) , where R is the shell radius, L is the mechanical power, and n is the ambient density. This adiabatic model can be combined with the \hii\ region luminosity function to predict a galactic size distribution for superbubbles, that can be compared to those observed by \hi\ surveys of nearby galaxies. Such a comparison can yield insight on the global structure of the interstellar medium and the large-scale effect of massive stars.

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