| Autor: |
Dietrich Baade, A. Kaufer, S. Štefl, O. Stahl, B. Wolf, Th. Rivinius, A. Budovičová |
| Rok vydání: |
2000 |
| Předmět: |
|
| Zdroj: |
International Astronomical Union Colloquium. 175:240-243 |
| ISSN: |
0252-9211 |
| DOI: |
10.1017/s0252921100055913 |
| Popis: |
Spectra of the Be star 28 CMa obtained with the HEROS echelle spectrograph in 1996 and 1997 were used to check the presence of transient periods in commonly measured scalar parameters of absorption and emission lines. Transient periods can be convincingly detected in modes of higher absorption and single peak emission lines of the Balmer series as well as in the V/R ratio of Fell lines. Consequences for the frequency analyses of datasets containing radial velocities derived from different ions are discussed. The significant differences in amplitudes of radial velocities of different ions and in individual seasons were confirmed and a mean ephemeris derived. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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