Detection of frequency spacings in the young O-type binary HD 46149 from CoRoT photometry

Degroote, P.; Briquet, M.; Auvergne, M.; Simón-Díaz, S.; Aerts, C.; Noels, A.; Rainer, M.; Hareter, M.; Poretti, E.; Mahy, L.; Oreiro, R.; Vučković, M.; Smolders, K.; Baglin, A.; Baudin, F.; Catala, C.; Michel, E.; Samadi, R.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 519, id.A38

Fecha de publicación:
9
2010
Número de autores
18
Número de autores del IAC
1
Número de citas
57
Número de citas referidas
41
Descripción
Aims: Using the CoRoT space based photometry of the O-type binary HD 46149, stellar atmospheric effects related to rotation can be separated from pulsations, because they leave distinct signatures in the light curve. This offers the possibility of characterising and exploiting any pulsations seismologically. Methods: Combining high-quality space based photometry, multi-wavelength photometry, spectroscopy and constraints imposed by binarity and cluster membership, the detected pulsations in HD 46149 are analyzed and compared with those for a grid of stellar evolutionary models in a proof-of-concept approach. Results: We present evidence of solar-like oscillations in a massive O-type star, and show that the observed frequency range and spacings are compatible with theoretical predictions. Thus, we unlock and confirm the strong potential of this seismically unexplored region in the HR diagram. The CoRoT space mission was developed and is operated by the French space agency CNES, with participation of ESA's RSSD and Science Programmes, Austria, Belgium, Brazil, Germany, and Spain.Based on observations made with the ESO telescopes at La Silla Observatory under the ESO Large Programme LP182.D-0356.Based on observations made with the Mercator Telescope, operated on the island of La Palma by the Flemish Community, at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias.
Proyectos relacionados
Physical properties and evolution of massive stars
Propiedades Físicas y Evolución de Estrellas Masivas
Las estrellas masivas son objetos claves para la Astrofísica. Estas estrellas nacen con más de 8 masas solares, lo que las condena a morir como Supernovas. Durante su rápida evolución liberan, a través de fuertes vientos estelares, gran cantidad de material procesado en su núcleo y, en determinadas fases evolutivas, emiten gran cantidad de
Sergio
Simón Díaz