| Autor: |
E. Panko, A. E. Tarasov |
| Rok vydání: |
2000 |
| Předmět: |
|
| Zdroj: |
International Astronomical Union Colloquium. 175:543-546 |
| ISSN: |
0252-9211 |
| Popis: |
The parameters of the Hα line profile of the Be star o And were determined from observations carried out during the period 1985 - 1998. At this time the line has undergone significant changes – from a pure absorption photospheric profile with no sign of an envelope in 1985 to the transition into the shell phase with a very narrow and deep absorption component in 1989. During 1991 - 1998 the Hα emission remained at the level achieved in 1989. The line profile showed short-term changes. The envelope development in the time interval 1985 - 1998 does not confirm the previously found period of 8.5 years. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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