Superbubbles as Space Barometers

Details Superbubbles as Space Barometers Superbubbles as Space Barometers

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jkas...37..217g&link_type=abstract

Journal of the Korean Astronomical Society, vol. 37, no. 4, pp. 217-222

Astronomy and Astrophysics

Astronomy

Galaxies: Ism, Magellanic Clouds, Ism: Bubbles, Ism: General, Supernova Remnants

Scientific paper

High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous observed growth-rate discrepancy for supernova-driven superbubbles and stellar wind bubbles. Pressures of P/k˜ 105 çK are plausible for regions with high star formation rates, and these values are intermediate between the estimated Galactic mid-plane pressure and those observed in starburst galaxies. High-pressure components also are commonly seen in Galactic ISM localizations. We demonstrate the sensitivity of shell growth to the ambient pressure, and suggest that superbubbles ultimately might serve as ISM barometers.

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