Possible detection of an emission feature near 584 A in the direction of G191-B2B

Journal Article · Sun Apr 01 00:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168650· OSTI ID:6865461

Green, J; Bowyer, S; Jelinsky, P ^[1]

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1. California Univ., Berkeley (USA)

A 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. 15 refs.

• OSTI ID: 6865461
• Journal Information: Astrophysical Journal; (USA), Vol. 353; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
WHITE DWARF STARS
EMISSION SPECTRA
NEBULAE
ROCKETS
STELLAR ATMOSPHERES
ULTRAVIOLET SPECTRA
ATMOSPHERES
DWARF STARS
SPECTRA
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources