Ultraviolet and visual spectroscopy of DB white dwarfs
1987; IOP Publishing; Volume: 319; Linguagem: Inglês
10.1086/165508
ISSN1538-4357
Autores Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (26) References (61) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet and Visual Spectroscopy of DB White Dwarfs Wegner, G. ; Nelan, E. P. Abstract Visual wavelength and IUE ultraviolet spectroscopy and model atmospheres of DB white dwarfs are reported. A search for spectral lines due to elements other than helium, and in particular carbon and hydrogen, was made. In no case is there a positive detection of carbon from these data, and upper limits relative to helium by number are derived in the range of C:He < 10-5 to 10-7 for the 15 DB stars with ultraviolet spectra in the temperature range 11,000K < Teff< 23,000K. Additional new DBA stars are reported. Weak hydrogen Balmer lines are observed in the spectra of five of the 27 objects. Publication: The Astrophysical Journal Pub Date: August 1987 DOI: 10.1086/165508 Bibcode: 1987ApJ...319..916W Keywords: Stellar Models; Stellar Spectrophotometry; Ultraviolet Spectra; Visible Spectrum; White Dwarf Stars; Abundance; Balmer Series; Carbon; Hydrogen; Iue; Astrophysics; STARS: ABUNDANCES; STARS: WHITE DWARFS; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (34) MAST (1) INES (1)
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