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New observations of interstellar abundances and depletions of boron, vanadium, chromium, and cobaltNew observations of interstellar lines of boron, vanadium, chromium, and cobalt in the spectra of Zeta Oph and Xi Per have been obtained with the Copernicus satellite. Chromium has been detected for the first time toward a reddened star, and cobalt has been seen for the first time in any interstellar line of sight. New limits have been obtained for boron and vanadium. These new data, along with limits on scandium and other species from the literature, have been compared with models for the depletion process. No fully conclusive test of depletion models is yet possible, but the new data on boron appear to favor the hypothesis that the depletions are dominated by accretion of gas-phase particles onto grains, rather than being due to grain condensation under pressure equilibrium. The impact of these new data on the study of grain surface properties is described.
Document ID
19800032694
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Snow, T. P., Jr.
(Colorado, University Boulder, Colo., United States)
Weiler, W. J.
(NASA Headquarters Washington, DC United States)
Oegerle, W. R.
(Princeton University New Observatory, Princeton, N.J., United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1979
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
80A16864
Funding Number(s)
CONTRACT_GRANT: NSG-5246
CONTRACT_GRANT: NAS2-3576
Distribution Limits
Public
Copyright
Other

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