6533b857fe1ef96bd12b4469
RESEARCH PRODUCT
A photometric study of Be stars located in the seismology fields of COROT
A.-m. HubertMichele FloquetJuan FabregatJuan FabregatR. GarridoJ. SusoM. LanzaraJuan Gutiérrez-sotoJuan Gutiérrez-sotosubject
statistics [Stars]:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Otras [UNESCO]FOS: Physical sciencesoscillations (including pulsations) [Stars]Context (language use)AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciences0103 physical sciencesUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::OtrasAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysics010308 nuclear & particles physicsphotometric [Techniques]Astrophysics (astro-ph)Astronomy and AstrophysicsLight curveStars : emission-line Be; Stars : oscillations (including pulsations); Stars : statistics; Techniques : photometricStarsemission-line Be [Stars]Space and Planetary ScienceSatelliteAstrophysics::Earth and Planetary AstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::EstrellasSeismology:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Estrellas [UNESCO]description
Context: In preparation for the COROT mission, an exhaustive photometric study of Be stars located in the seismology fields of the COROT mission has been performed. The very precise and long-time-spanned photometric observations gathered by the COROT satellite will give important clues of the origin of the Be phenomenon. Aims: The aim of this work is to find short-period variable Be stars located in the seismology fields of COROT and to study and characterise their pulsational properties. Methods: Light curves obtained at the Observatorio de Sierra Nevada together with data from Hipparcos and ASAS-3 of a total of 84 Be stars have been analysed in order to search for short-term variations. We have applied standard Fourier techniques and non-linear least-square fitting to the time series. Results: We have found 7 multiperiodic, 21 mono-periodic and 26 non-variable Be stars. Short-term variability has been detected in 74% of early-type Be stars and in 31% of mid- to late-type Be stars. We have shown that non-radial pulsations are most frequent among Be stars than in slow-rotating B stars of the same spectral range.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-09-28 |