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Massive stars shaping the ISM: H I holes and shells in nearby galaxies

Published online by Cambridge University Press:  25 May 2016

Elias Brinks  and
Fabian Walter
Elias Brinks
Affiliation:
Departamento de Astronomía, Universidad de Guanajuato, Mexico
Fabian Walter
Affiliation:
Radioastronomisches Institut der Universität Bonn, Germany

Abstract

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Neutral hydrogen (H I) is a magnificent tool when studying the structure of the interstellar medium (ISM) as it is relatively easily observable and can be mapped at good spatial and velocity resolution with modern instruments. Moreover, it traces the cool (∼ 100 K) and warm (∼ 5000 K) neutral gas which together make up about 60%, or the bulk, of the ISM. The currently accepted picture is that stellar winds and subsequent supernovae are the origin for the clearly defined holes or bubbles within the more or less smooth neutral medium. The H I can therefore serve indirectly as a tracer of the hot interstellar medium (HIM) left behind after the most massive stars within an OB association have gone off as supernovae. A splendid example is the dwarf galaxy IC 2574 for which we discuss H I, optical and X-ray observations.

Type
Part 6. Starbursts in normal and active galaxies: their effects on the ISM and on chemical evolution
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 636 - 644
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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