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Issue A&A
Volume 506, Number 1, October IV 2009
The CoRoT space mission: early results
Page(s) 79 - 83
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361/200911932
Published online 27 July 2009

A&A 506, 79-83 (2009)
DOI: 10.1051/0004-6361/200911932

Asteroseismic analysis of the CoRoT $\delta$ Scuti star HD 174936

A. García Hernández1, A. Moya1, E. Michel2, R. Garrido1, J. C. Suárez1, E. Rodríguez1, P. J. Amado1, S. Martín-Ruiz1, A. Rolland1, E. Poretti3, R. Samadi2, A. Baglin2, M. Auvergne2, C. Catala2, L. Lefevre2, and F. Baudin4

1  Instituto de Astrofísica de Andalucía (CSIC), CP3004, Granada, Spain
    e-mail: agh@iaa.es
2  Observatoire de Paris, LESIA, CNRS, UMR 8109, 92195 Meudon, France
3  INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
4  Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bât. 121, 91405 Orsay, France

Received 23 February 2009 / Accepted 23 July 2009

Abstract
We present an analysis of the $\delta$-Scuti star HD 174936 ( ID 7613 ) observed by CoRoT during the first short run SRc01 (27 days). A total number of 422 frequencies were extracted from the light curve using standard prewhitening techniques. This number of frequencies was obtained by considering a spectral significance limit of sig = 10 using the software package SigSpec. Our analysis of the oscillation frequency spectrum reveals a spacing periodicity around 52 $\mu$Hz. Although modes considered here are not in the asymptotic regime, a comparison with stellar models confirms that this signature may stem from a quasi-periodic pattern similar to the so-called large separation in solar-like stars.


Key words: $\delta$ Sct -- stars: rotation -- stars: oscillations -- stars: fundamental parameters -- stars: interiors



© ESO 2009


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