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Anomalously high intercombination line ratios in symbiotic stars - Extreme Bowen pumping?International Ultraviolet Explorer observations of the ratio of the O III intercombination lines near 1660 A are assembled, showing that the observed ratios in symbiotic stars are significantly higher than the theoretically predicted optically thin limit of 2.5. The presence of an enhancing physical process is thereby indicated. It is suggested that Bowen pumping of the lower level of the 1666.2 A line in an 'external saturation' limit, coupled with appreciable optical depth, could logically explain the high ratios. Some tentative evidence for this is presented and the relevance of far-infrared observations of the O III 51.8 and 88.3 micron lines in symbiotic sources is emphasized.
Document ID
19890047819
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kastner, S. O.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bhatia, A. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Feibelman, W. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
March 15, 1989
Publication Information
Publication: Royal Astronomical Society, Monthly Notices
Volume: 237
ISSN: 0035-8711
Subject Category
Astrophysics
Accession Number
89A35190
Distribution Limits
Public
Copyright
Other

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