Simultaneous visible and ultraviolet spectroscopy of stellar wind variability in Zeta Puppis
1978; IOP Publishing; Volume: 226; Linguagem: Inglês
10.1086/182823
ISSN1538-4357
Autores Tópico(s)Astro and Planetary Science
Resumoview Abstract Citations (15) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Simultaneous visible and ultraviolet spectroscopy of stellar wind variability in zeta Puppis. Wegner, G. A. ; Snow, T. P., Jr. Abstract Spectra of He II 4686 A and H-alpha in Zeta Pup were obtained simultaneously with Copernicus ultraviolet scans of several P Cygni profiles in this O4 If supergiant with strong mass loss. The visible-wavelength data show significant variations in the profiles of both lines, consisting of doubling of the emission over times of less than a day. Recent theoretical calculations show that the observed profile variations in 4686 A can be produced by significant fluctuations in the wind density. The Copernicus data show less variability, although in one scan of the 1400-A Si IV doublet there appears to be a significant enhancement of the emission which may be correlated with one of the doublings observed in 4686 A and H-alpha, as though a density enhancement formed at low levels and then moved outward in the wind. Publication: The Astrophysical Journal Pub Date: November 1978 DOI: 10.1086/182823 Bibcode: 1978ApJ...226L..25W Keywords: Astronomical Spectroscopy; O Stars; Stellar Winds; Ultraviolet Astronomy; H Alpha Line; Helium; Stellar Mass Ejection; Supergiant Stars; Astrophysics; Mass Loss:Of Stars; Of Stars:P Cygni Profiles; Of Stars:Spectra; Stellar Winds: Variations full text sources ADS | data products SIMBAD (3)
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