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| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Universidad Nacional Autónoma de México
2014
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=57131044008 |
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Table des matières:
- EPOCH-DEPENDENT ABSORPTION LINE PROFILE VARIABILITY IN λ CEP J. M. Uuh-Sonda G. Rauw P. Eenens L. Mahy M. Palate E. Gosset C. A. Flores Física, Astronomía y Matemáticas Stars: early type — stars: individual (λ Cep) — stars: oscillations — stars: variables: general We present the analysis of a multi-epoch spectroscopic monitoring campaign of the O6 Ief star λ Cep. Previous observations reported the existence of two modes of non-radial pulsations in this star. Our data reveal a much more complex situation. The frequency content of the power spectrum considerably changes from one epoch to the other. We find no stable frequency that can unambiguously be attributed to pulsations. The epoch-dependence of the frequencies and variability patterns are similar to what is seen in the wind emission lines of this and other Oef stars, suggesting that both phenomena likely have the same, currently still unknown, origin. 2014 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57131044008 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.50