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Intersystem transitions of interstellar carbon monoxide toward zeta OphiuchiAbsorption from seven intersystem (triplet-singlet) transitions of interstellar (12)CO were detected in ultraviolet spectra of zeta Oph. The observed equivalent widths are approximately consistent with the transitions' predicted f-values and the (12) CO column density derived from the weakest of the observed A-X bands. These unsaturated intersystem transitions provide the opportunity to measure the (12)CO column density for heavily reddened (dense) sight lines. Laboratory measurements of oscillator strengths more precise than available ones will be needed to derive accurate column densities.
Document ID
19950040582
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Federman, S. R.
(Univ. of Toledo, Toledo, OH United States)
Cardelli, Jason A.
(Univ. of Wisconsin, Madison, WI United States)
Sheffer, Yaron
(Univ. of Texas, Austin, TX United States)
Lambert, David L.
(Univ. of Texas, Austin, TX United States)
Morton, D. C.
(National Research Council Ottawa, Ontario, Canada)
Date Acquired
August 16, 2013
Publication Date
September 10, 1994
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 432
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A72181
Funding Number(s)
CONTRACT_GRANT: NAGW-2520
CONTRACT_GRANT: NAG5-1616
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: NAGW-3840
Distribution Limits
Public
Copyright
Other

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