Do tidal effects determine the spot distribution on active binaries?
| Autor: | Volkmar Holzwarth, Manfred Schüssler |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Physics
Starspot Astronomy Flux Astronomy and Astrophysics Astrophysics Magnetic flux Physics::Geophysics Distribution (mathematics) Space and Planetary Science Middle latitudes Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Magnetohydrodynamics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomische Nachrichten. 323:399-401 |
| ISSN: | 1521-3994 0004-6337 |
| DOI: | 10.1002/1521-3994(200208)323:3/4<399::aid-asna399>3.0.co;2-v |
| Popis: | Observations of spot distributions on active binaries indicate the existence of preferred longitudes, which are more pronounced if the system period is shorter. This suggests that this effect is caused by the proximity of the companion star. We explore whether preferred longitudes can be explained by tidal effects on the dynamics of magnetic flux tubes, which are thought to give rise to starspots upon emergence at the stellar surface. We find that in the case of fast-rotating binaries flux tubes erupting at mid latitudes show indeed a considerably non-uniform longitudinal distribution. |
| Databáze: | OpenAIRE |
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