The spectral energy distribution of Zeta Puppis and HD 50896
1977; IOP Publishing; Volume: 211; Linguagem: Inglês
10.1086/154949
ISSN1538-4357
Autores Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (43) References (53) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The spectral energy distribution of Zeta Puppis and HD 50896. Holm, A. V. ; Cassinelli, J. P. Abstract The ultraviolet spectral energy distribution of the O5f star Zeta Pup and the WN5 star HD 50896 are derived from OAO-2 observations with the calibration of Bless, Code, and Fairchild (1976). An estimate of the interstellar reddening (0.12 magnitude) of the Wolf-Rayet star is determined from the size of the characteristic interstellar extinction bump at 4.6 inverse microns. After correction for extinction, both stars show a flat energy distribution in the ultraviolet. The distribution of HD 50896 from 1100 A to 2 microns is in good agreement with results of extended model atmospheres, but some uncertainty remains because of the interstellar-extinction correction. The absolute energy distribution of Zeta Pup is fitted by a 42,000-K plane-parallel model if the model's flux is adjusted for the effects of electron scattering in the stellar wind and for UV line blanketing that was determined empirically from high-resolution Copernicus satellite observations. To achieve this fit, it is necessary to push both the spectroscopically determined temperature and the ultraviolet calibration to the limits of their probable errors. Publication: The Astrophysical Journal Pub Date: January 1977 DOI: 10.1086/154949 Bibcode: 1977ApJ...211..432H Keywords: Interstellar Extinction; O Stars; Satellite Observation; Spectral Energy Distribution; Stellar Spectrophotometry; Ultraviolet Spectra; Astronomical Models; Electron Scattering; Line Spectra; Oao 3; Spaceborne Astronomy; Stellar Spectra; Stellar Winds; Wolf-Rayet Stars; Astrophysics full text sources ADS | data products SIMBAD (2)
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