Time series observations of O stars. I - IUE observations of variability in the stellar wind of Zeta Puppis
1992; IOP Publishing; Volume: 390; Linguagem: Inglês
10.1086/171276
ISSN1538-4357
AutoresR. K. Prinja, L. A. Balona, C. T. Bolton, R. Crowe, M. S. Fieldus, A. W. Fullerton, Douglas R. Gies, I. D. Howarth, D. McDavid, Andy Reid,
Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (50) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Time Series Observations of O Stars. I. IUE Observations of Variability in the Stellar Wind of zeta Puppis Prinja, R. K. ; Balona, L. A. ; Bolton, C. T. ; Crowe, R. A. ; Fieldus, M. S. ; Fullerton, A. W. ; Gies, D. R. ; Howarth, I. D. ; McDavid, D. ; Reid, A. H. N. Abstract Stellar wind variability in Zeta Pup (O4 I(n)f) is described based on 31 high-resolution IUE observations secured over 5 1/2 days in 1989 April. Extensive changes are evident in the absorption regions of Si IV 1393.76, 1402.77A and N IV 1718.55A P Cygni profiles. Both lines exhibit similar patterns of variability, which are characterized by the development and subsequent blueward migration, of discrete absorption components. The formation of four discrete features is identified over about 2.2 days of intensive observations, with a recurrence time of about 15 hr. The time scales, velocities, and accelerations of the progressive absorption enhancements are determined. These changes are accompanied by fluctuations of up to about 200 km/s in the maximum observed blue edge velocities in saturated C IV and N V P Cygni profiles. Publication: The Astrophysical Journal Pub Date: May 1992 DOI: 10.1086/171276 Bibcode: 1992ApJ...390..266P Keywords: Early Stars; Stellar Mass Ejection; Stellar Spectra; Stellar Winds; Ultraviolet Astronomy; Ultraviolet Spectra; Absorption Spectra; Iue; Line Spectra; Satellite Observation; Spectrum Analysis; Time Series Analysis; Astronomy; LINE: PROFILES; STARS: EARLY-TYPE; STARS: INDIVIDUAL CONSTELLATION NAME: ZETA PUPPIS; STARS: MASS LOSS; ULTRAVIOLET: STARS full text sources ADS | data products SIMBAD (3) MAST (1) INES (1) Related Materials (5) Part 2: 1993ApJ...417..320R Part 3: 1993ApJ...417..338H Source Software: 2014ascl.soft06016G Used in: 1998A&A...338.1057J Used in: 2002ApJS..140...37F
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