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Analysis of the chromospheric spectrum of O I in ArcturusThe ultraviolet and near-infrared spectra of O I in Arcturus are analyzed by a 15-level 14-transition model for O I and the Ayres-Linsky (1975) model chromosphere. It is found that the anomalously bright O I resonance lines at 1302, 1305, and 1306 A can be readily explained by a Ly-beta-pumped fluorescence mechanism as originally proposed by Bowen (1974). Observed equivalent widths of the near-infrared triplet and singlet lines are also consistent with the model predictions, but the intercombination lines at 1355 and 1359 A and near-infrared quintet lines may pose a problem.
Document ID
19770052259
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Haisch, B. M.
(Joint Institute for Laboratory Astrophysics Boulder, Colo., United States)
Linsky, J. L.
(Joint Institute for Laboratory Astrophysics; National Bureau of Standards, Laboratory Astrophysics Div., Boulder Colo., United States)
Weinstein, A.
(Johns Hopkins University Baltimore, Md., United States)
Shine, R. A.
(Colorado, University Boulder, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
June 15, 1977
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
77A35111
Funding Number(s)
CONTRACT_GRANT: NGR-21-001-001
CONTRACT_GRANT: NAS5-22409
CONTRACT_GRANT: NAS5-23274
CONTRACT_GRANT: NGR-06-003-057
Distribution Limits
Public
Copyright
Other

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