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The november 1987 eclipse of the zeta-aur system hr 2554
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Parsons, Sidney B. Ake II, Thomas B. |
| Copyright Year | 1988 |
| Description | It is confirmed that HR 2554 (G6 II + A0 V) is an atmospheric eclipsing system of the zeta-Aur type. The IUE observations of the Nov. 1987 eclipse indicate that the eclipse of the A star lasts 4 days and is not total. Absorption lines due to the extended atmosphere of the primary can be seen a day before and after the eclipse and are missing 2 days from first and 4th contact. Thus the outer envelope of the primary extends to less than 1 stellar radius beyond the photosphere. Compared to 22 Vul (G3 Ib-II + B9 V), where the absorption can be traced to a few stellar radii, HR 2554 is a more moderate case of mass outflow, which implies there is reduced interaction of the secondary within the wind from the primary as is seen in the other zeta-Aur systems. |
| File Size | 160120 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890001350 |
| Archival Resource Key | ark:/13960/t7zm07k3k |
| Language | English |
| Publisher Date | 1988-06-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Eclipsing Binary Stars Stellar Atmospheres Stellar Envelopes Stellar Mass Spaceborne Astronomy Ultraviolet Spectra Iue Eclipses 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 |
