The Chemical Composition of the Interstellar gas
Open Access
- 1 August 1951
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 111 (4) , 368-376
- https://doi.org/10.1093/mnras/111.4.368
Abstract
Summaries are given of the atomic ionization and recombination data required in the calculation of interstellar ionization equilibrium. The chemical composition of the interstellar gas is discussed from the standpoint of seeking to establish whether there is any evidence for discrepancies between the interstellar and “ mean cosmic ” abundance ratios. The important Ca / Na ratio is the only case for which there is an apparent discrepancy, but it is shown that this may be removed if recent work on the ultra-violet radiation field is accepted as correct.Keywords
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