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Bubbles and Superbubbles: Observations and Theory

Published online by Cambridge University Press:  01 December 2007

You-Hua Chu
You-Hua Chu*
Affiliation:
Astronomy Department, University of Illinois, 1002 W. Green Street, Urbana, IL 61801, USA email: [email protected]
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Abstract

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Massive stars inject energy into the surrounding medium and form shell structures. Bubbles are blown by fast stellar winds from individual massive stars, while superbubbles are blown by fast stellar winds and supernova explosions from groups of massive stars. Bubbles and superbubbles share a similar overall structure: a swept-up dense shell with an interior filled by low-density hot gas. Physical properties of a bubble/superbubble can be affected by magnetic field, thermal conduction, turbulent mixing, inhomogeneous ambient medium, etc. I will review recent progresses on observations and compare them to theoretical expectations for (1) swept-up dense shells, (2) hot interiors, and (3) interface between a dense shell and its interior hot gas.

Keywords

ISM: bubbles – ISM: structure – circumstellar matter – stars: mass loss – stars: Wolf-Rayet – stars: windsoutflows – supernova remnants
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S250: Massive Stars as Cosmic Engines , December 2007 , pp. 341 - 354
Copyright
Copyright © International Astronomical Union 2008

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