Abstract
view Abstract Citations (18) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Unusual Ultraviolet Chromospheric Spectrum of the R Coronae Borealis Star, V854 Centauri (NSV 6708), at Minimum Light Clayton, Geoffrey C. ; Whitney, Barbara A. ; Stanford, S. A. ; Drilling, John S. ; Judge, P. G. Abstract Results are presented of IUE observations of a decline of the recently discovered R CrB star, V854 Cen. These observations are of particular interest because they include spectra taken at 7 mag below maximum light. The 'chromospheric' emission spectra show striking differences from UV spectra of other R CrB stars in decline. Strong emission appears in several lines not normally seen in R CrB emission-line spectra, in particular at semiforbidden C II 2326, Mg I 2852, and C I 2965, 2967. Spectral evolution similar to that seen in visible spectra of R CrB stars is clearly seen in the UV. It is argued that the differences between V854 Cen and other R CrB stars are related to known abundance differences or to different temperature and density conditions in the emission-line regions of the various R CrB stars. The emission may also be significantly affected by the presence of dust in or near the emitting region. Publication: The Astrophysical Journal Pub Date: January 1992 DOI: 10.1086/186253 Bibcode: 1992ApJ...384L..19C Keywords: Chromosphere; R Coronae Borealis Stars; Stellar Coronas; Stellar Spectra; Ultraviolet Spectra; Iue; Line Spectra; Spectrum Analysis; Ultraviolet Astronomy; Astrophysics; STARS: CHROMOSPHERES; STARS: INDIVIDUAL CONSTELLATION NAME: V854 CENTAURI; ULTRAVIOLET: STARS full text sources ADS | data products SIMBAD (4) MAST (1) INES (1)
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