Gamma-ray line emission from superbubbles in the interstellar medium: the cygnus region - INSPIRE

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Gamma-ray line emission from superbubbles in the interstellar medium: the cygnus region

Jun, 2001

5 pages

Part of Gamma-ray astrophysics. Proceedings, Symposium, Gamma 2001, Baltimore, USA, April 4-6, 2001, 518

Published in:

AIP Conf.Proc. 587 (2001) 1, 518

Contribution to:

6th Compton Symposium on Gamma Ray Astrophysics 2001, 518

Published: Feb 20, 2002

e-Print:

astro-ph/0106125 [astro-ph]

DOI:

10.1063/1.1419456

View in:

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Abstract: (arXiv)

The star forming process in the Milky Way is non-uniform in time and space. The scale of star forming regions ranges from groups within a few pc to large segments of spiral arms with linear dimension of order kpc. When many stars form in a relatively small volume over a short duration, a localized starburst ensues. The energetic impact of such a burst of star formation can severely affect the dynamic structure of the gaseous disk. Stellar winds and supernova explosions drive an expanding superbubble, whose size eventually exceeds the scale height of the disk and thus drives a disk-wind blowing metal enriched gas into the halo. We discuss the basic scenario of superbubble evolution, emphasizing the associated gamma-ray line signatures. In particular, we discuss nuclear line emission from 26Al and 60Fe in the Cygnus region.

References(23)

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