Loading...
Please wait, while we are loading the content...
Similar Documents
Copernicus observations of betelgeuse and antares
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bernat, A. P. Lambert, D. L. |
| Copyright Year | 1975 |
| Description | Copernicus observations of the M-supergiants, alpha Ori and alpha Sco, are presented. The MgII h and k resonance lines are strongly in emission in both stars. The k line is highly asymmetric in both stars but the h line is symmetric. Upper limits for several other resonance lines are given for alpha Ori. The possibility is explored that the k line asymmetry is caused by overlying resonance lines of MnI and FeI formed in the cool circumstellar gas shells around these stars. Observations of the MnI 4030-4033 A lines are used to show that circumstellar shell absorption is too weak to explain the asymmetry. It is suggested that the absorption occurs in a cool turbulent region between the base of the circumstellar shell and the top of the chromosphere. |
| File Size | 1251891 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750016526 |
| Archival Resource Key | ark:/13960/t6159c712 |
| Language | English |
| Publisher Date | 1975-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Supergiant Stars Stellar Envelopes Satellite Observation Line Spectra Emission Spectra Oao 3 Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
