Single Gaussian curve of growth abundance determinations from ultraviolet interstellar absorption-line data

Details Single Gaussian curve of growth abundance determinations from ultraviolet interstellar absorption-line data Single Gaussian curve of growth abundance determinations from ultraviolet interstellar absorption-line data

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322..368h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 322, Nov. 1, 1987, p. 368-373.

Astronomy and Astrophysics

Astrophysics

2

Absorption Spectra, Abundance, Interstellar Gas, Iue, Ultraviolet Spectra, Depletion, Doppler Effect, Hydrogen

Scientific paper

Equivalent-width data sets used in published studies of interstellar element abundances in many sight lines are examined for evidence of saturation-related errors which give rise to, or enhance, the apparent correlations of depletion with mean hydrogen volume density, n-bar(H). It is shown that the same abundance data which exhibit a strong dependence on n-bar(H) show no tendency to correlate similarly with the strength of optical depth of the absorption lines, in contrast to the behavior expected if the apparent density dependence were due primarily to effects arising from line saturation. It is demonstrated that an apparent discrepancy between S II and P II b-values is essentially independent of the strength of the S II lines and n-bar(H).

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