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Possible detection of an emission feature near 584 A in the direction of G191-B2BA possible spectral emission feature is reported in the direction of the nearby hot white dwarf G191-B2B at 581.5 + or - 6 A with a significance of 3.8 sigma. This emission has been identified as He I 584.3 A. The emission cannot be due to local geocoronal emission or interplanetary backscatter of solar He I 584 A emission because the feature is not detected in a nearby sky exposure. Possible sources for this emission are examined, including the photosphere of G191-B2B, the comparison star G191-B2A, and a possible nebulosity near or around G191-B2B. The parameters required to explain the emission are derived for each case. All of these explanations require unexpected physical conditions; hence we believe this result must receive confirming verification despite the statistical likelihood of the detection.
Document ID
19900044376
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Green, James
(California Univ. Berkeley, CA, United States)
Bowyer, Stuart
(California Univ. Berkeley, CA, United States)
Jelinsky, Patrick
(California, University Berkeley, United States)
Date Acquired
August 14, 2013
Publication Date
April 20, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 353
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A31431
Funding Number(s)
CONTRACT_GRANT: NGR-05-003-450
Distribution Limits
Public
Copyright
Other

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