Bibcode
Dolez, N.; Vauclair, S.; Michel, E.; Hui-Bon-Hoa, A.; Vauclair, G.; Le Contel, D.; Mathias, P.; Poretti, E.; Amado, P. J.; Rainer, M.; Samadi, R.; Baglin, A.; Catala, C.; Auvergne, M.; Uytterhoeven, K.; Valtier, J.-C.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 506, Issue 1, 2009, pp.159-165
Fecha de publicación:
10
2009
Revista
Número de citas
3
Número de citas referidas
3
Descripción
Context: We present an analysis of the observations of HD 51106 and HD
50747 by the satellite CoRoT, obtained during its initial run, and of
the spectroscopic preparatory observations. Aims: We complete an
analysis of the light curve, extract the main frequencies observed, and
discuss some preliminary interpretations about the stars. Methods: We used standard Fourier transform and pre-whitening methods
to extract information about the periodicities of the stars. Results: HD 51106 is an ellipsoidal binary, the light curve of which
can be completely explained by the tidal deformation of the star and
smaller secondary effects. HD 50747 is a triple system containing a
variable star, which exhibits many modes of oscillation with periods in
the range of a few hours. On the basis of this period range and the
analysis of the physical parameters of the star, we conclude that HD
50747 is a γ-Doradus star.
Based on observations obtained by CoRoT, a space project operated by the
French Space Agency (CNES) with the participation of the Science Program
of ESA, ESTEC/RSSD, Austria, Belgium, Brazil, Germany, and Spain. Also
based on observations made with ESO telescopes at the La Silla
Observatory under the ESO large program LP178.D-0361, at the
Observatoire de Haute Provence, INSU/CNRS, France, and on observations
collected at the Centro Astronómico Hispano Alemán (CAHA)
at Calar Alto, operated jointly by the Max-Planck Institut für
Astronomie and the Instituto de Astrofísica de Andalucía.