Document Type
Article
Publication Date
1975
Abstract
The excitation of the interstellar gas. is discussed in the light of recent evidence from γ-ray, molecular, and 21-cm line observations. Previous studies of the excitation of the interstellar gas have not taken into account the substantial density contrast that exists between spiral arms and interarm regions. We examine the role played by the galactic distribution of three sources of excitation (supernovae, OB stars, and ultraviolet stars) in determining the physical state of the interstellar gas in arm and interarm regions.
Recommended Citation
Cowan, J.J., Kafatos, M., Rose, W.K. (1975) Sources of Excitation of the Interstellar Gas and Galactic Structure, Astrophysical Journal, 195: 47-51. doi: 10.1086/153302
Peer Reviewed
1
Copyright
IOP Publishing
Comments
This article was originally published in Astrophysical Journal, volume 195, in 1975. DOI: 10.1086/153302