| タイトル | Time series observations of O stars. I - IUE observations of variability in the stellar wind of Zeta Puppis |
| 著者（英） | Crowe, R. A.; Gies, D. R.; Bolton, C. T.; Balona, L. A.; Reid, A. H. N.; Mcdavid, D.; Fieldus, M. S.; Prinja, R. K.; Howarth, I. D.; Fullerton, A. W. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1992-05-01 |
| 言語 | eng |
| 内容記述 | 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. |
| NASA分類 | ASTRONOMY |
| レポートNO | 92A35398 |
| 権利 | Copyright |
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