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SUPERBUBBLES AS SPACE BAROMETERS
GARCIA-SEGURA G.,OEY M. S. The Korean Astronomical Society 2004 Journal of The Korean Astronomical Society Vol.37 No.4
High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous ob-served growth-rate discrepancy for supernova-driven super bubbles and stellar wind bubbles. Pressures of P / k ${\~} 10^5\;cm^{-3}$ K 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 super bubbles ultimately might serve as ISM barometers.
SUPERBUBBLES AS SPACE BAROMETERS
G. GARCIA-SEGURA,M. S. OEY 한국천문학회 2004 Journal of The Korean Astronomical Society Vol.37 No.5
High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous ob-served growth-rate discrepancy for supernova-driven superbubbles and stellar wind bubbles. Pressuresof P/k~ 10^5 cm^-3 K are plausible for regions with high star formation rates, and these values areintermediate between the estimated Galactic mid-plane pressure and those observed in starburst galax-ies. High-pressure components also are commonly seen in Galactic ISM localizations. We demonstratethe sensitivity of shell growth to the ambient pressure, and suggest that superbubbles ultimately mightserve as ISM barometers.