Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-10-15
Astronomy and Astrophysics
Astrophysics
11 pages + 3 figues. Accepted for publication in the Astrophysical Journal
Scientific paper
10.1086/306863
Properties of starburst-driven outflows in dwarf galaxies are compared to those in more massive galaxies. Over a factor of roughly 10 in galactic rotation speed, supershells are shown to lift warm ionized gas out of the disk at rates up to several times the star formation rate. The amount of mass escaping the galactic potential, in contrast to the disk, does depend on the galactic mass. The temperature of the hottest extended \x emission shows little variation around $\sim 10^{6.7}$ K, and this gas has enough energy to escape from the galaxies with rotation speed less than approximately 130 km/s.
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