Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..573h&link_type=abstract
In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 573-57
Astronomy and Astrophysics
Astrophysics
Abundance, Depletion, Interstellar Chemistry, Interstellar Matter, Sulfur, Zinc, Astronomical Spectroscopy, Iue, Oao 3
Scientific paper
Depletion/density behavior of S and Zn was studied, using equivalent width data from Copernicus and IUE. The results provide evidence that the established dependence of depletion on mean hydrogen volume density extends to volatile elements. It appears that such elements may take part in the surface chemistry of grains and be important constituents of grain mantle material, although they probably do not contribute significantly to the bulk mass of grains. A comparison of Doppler widths derived for S II and P II in the same sight-lines suggests that the presently accepted oscillator strengths of the P II 1153 and 1302A lines may be inaccurate.
Harris Alan W.
Mas Hesse J. M.
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