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Recurrent shell infall events in a b0.5e star: hd 58978 1979-1988
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Henrichs, H. F. Bjorkman, K. S. Peters, G. J. Grady, C. A. |
| Copyright Year | 1988 |
| Description | Infall from the circumstellar envelope onto the bright B0.5 IVe star, HD 58978 was studied. The IUE data indicate that the star was surrounded by a low and moderately ionized circumstellar shell at least 12 times between 1979 and 1988. During 6 of these episodes, the signatures of cool circumstellar material were redshifted with respect to the photosphere by 20 to 80 km/sec. The data indicate that the transition from infall to minimal shell absorption can occur in under 10 days, and are consistent either with infall phases lasting up to 6 months, or with infall episodes shorter than 10 to 15 days. The long term behavior of the shell episodes is compared with variability in the stellar wind. |
| File Size | 302128 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890001361 |
| Archival Resource Key | ark:/13960/t5n924v18 |
| Language | English |
| Publisher Date | 1988-06-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Winds Stellar Atmospheres Stellar Envelopes Red Shift Stellar Mass Accretion Spaceborne Astronomy Ultraviolet Spectra Iue Mass Transfer Ultraviolet Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
