HOT VARIABLE STARS IN THE SMC CLUSTER NGC 330
| Autor: | J. B. Chobanian, Anne P. Cowley, P. C. Schmidtke |
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| Rok vydání: | 2008 |
| Předmět: |
Physics
Spiral galaxy Astrophysics::High Energy Astrophysical Phenomena K-type main-sequence star Stellar collision Flare star Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Herbig Ae/Be star Blue straggler T Tauri star Stars Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astronomical Journal. 135:1350-1360 |
| ISSN: | 1538-3881 0004-6256 |
| DOI: | 10.1088/0004-6256/135/4/1350 |
| Popis: | In a sample of 150 hot stars in NGC 330, a SMC cluster containing a high fraction of Be stars, we searched for photometric variables using OGLE II data. At least one third of all stars are variable, with 38 being periodic. We found 27 pulsators (λ Eri variables), six eclipsing systems, two bursting sources, and several stars with unusual photometric behavior. Pulsations are present in ~30% of known Be stars, and they are long lived, lasting more than a decade. The strongest pulsators are associated with stars evolved from the main sequence. |
| Databáze: | OpenAIRE |
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