Document Type

Article

Publication Date

1974

Abstract

If the intercloud medium in the solar neighborhood was suddenly ionized less than 106 years ago, the subsequent relaxation of the gas can account for the very low observed column density of C III and N III yet still leave a significant fraction ("'0.05) of ionized hydrogen and of C I in a cold (T ≈ 20° K) intercloud medium. The OAO-C Copernicus observations in the direction of X Sco are consistent with cosmic abundances and a uniform-density medium, except for C III whose predicted column density from the C m ionization zone surrounding the star is a factor ~1Q greater than the observed result.

Comments

This article was originally published in Astrophysical Journal, volume 187, in 1974. DOI: 10.1086/181410

Peer Reviewed

1

Copyright

IOP Publishing

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