First results from the Goddard High-Resolution Spectrograph - Elemental abundances in the diffuse clouds toward XI Persei

Details First results from the Goddard High-Resolution Spectrograph - Elemental abundances in the diffuse clouds toward XI Persei First results from the Goddard High-Resolution Spectrograph - Elemental abundances in the diffuse clouds toward XI Persei

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377l..57c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 377, Aug. 10, 1991, p. L57-L60.

Astronomy and Astrophysics

Astrophysics

80

Absorption Spectra, Abundance, Hubble Space Telescope, Interstellar Matter, Line Spectra, Molecular Clouds, Ultraviolet Spectra, Chemical Elements, H Ii Regions, High Resolution, O Stars

Scientific paper

An analysis is presented of high-resolution observations of ultraviolet interstellar absorption lines of dominant ion stages arising in the diffuse clouds toward Xi Per obtained with the Goddard High-Resolution Spectrograph. A detection of the weak intersystem line of semiforbidden C II 2325 A is reported. For C, O, and Mg, column densities are derived from both weak lines and the damping wings of strongly saturated lines. For Mg, the derived column densities differ by a factor three. Comparison of apparent column densities profiles, between lightly depleted and heavily depleted species indicates a transition from substantial depletions at v(solar) roughly 7.5 km/s to a decrease in depletion of a factor two or more for v(solar) = 7.5-20 km/s.

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