Physics
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dmp..op03m&link_type=abstract
American Physical Society, DAMOP Meeting, 27-30 May 1998 Santa Fe, New Mexico, abstract #OP.03
Physics
Scientific paper
We report the first laboratory measurements of 10 absolute oscillator strengths (f-values) for vacuum ultraviolet lines of Co II. The oscillator strengths are measured with the High Sensitivity Absorption Spectroscopy Experiment at the University of Wisconsin. The measurements serve as a test of theoretical work on Co II f-values and set an absolute scale for relative oscillator strengths from spectra taken with the Hubble Space Telescope. Observations of interstellar absorption in the direction of ρ Oph A result in the determination of the f-value for an additional line. The set of absolute f-values is used to derive the interstellar abundance of cobalt toward ρ Oph A and ζ Oph. Cobalt is found to be less severely depleted onto grains than earlier analyses based on available theoretical f-values suggested. As a consequence of this revision, the correspondence between depletion and condensation temperature is somewhat weakened.
Federman Steven Robert
Lawler James E.
Mullman Krista Lynn
Zsargo Janos
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