Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..848d&link_type=abstract
Astrophysical Journal, Part 1, vol. 244, Mar. 15, 1981, p. 848-854.
Astronomy and Astrophysics
Astronomy
67
Abundance, Interstellar Matter, Molecular Absorption, Molecular Spectra, Oxygen, Ultraviolet Astronomy, Absorption Spectra, Gas Density, Hydrogen Clouds, Line Of Sight, Oxygen Spectra, Ultraviolet Spectra
Scientific paper
Data for interstellar neutral oxygen absorption lines available in the literature for five unreddened and three reddened stars are reviewed to assess the accuracy of the derived column densities. The interstellar absorption spectra for ο Per are analyzed in detail along the lines of an earlier paper on ζ Oph data, leading to the upward revision of the published ο Per column density by more than half an order of magnitude.
From the sample of lines of sight, the abundance of oxygen in the interstellar medium is found to be consistent with log N(O)/N(H) = - 3.27 to unreddened stars and reddened stars [E(B - V) ≍ O.3] alike. Hence, in the diffuse interstellar medium, oxygen appears to be depleted only by 0.1 dex, compatible with oxygen in silicates only. However, for the unreddened stars a slightly greater depletion of oxygen is also compatible with the observations.
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