Asteroseismic analysis of the CoRoT δ Scuti star HD 174936
Auvergne, M.;
Amado, P. J.;
Baudin, F.;
Poretti, E.;
Michel, E.;
Garrido, R.;
Rodríguez, E.;
Martín-Ruiz, S.;
Moya, A.;
Suárez, J. C.;
Baglin, A.;
Catala, C.;
Samadi, R.;
García Hernández, A.;
Rolland, A.;
Lefevre, L.
Spain, France, Italy
Abstract
We present an analysis of the δ-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 μHz. 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.
The CoRoT space mission, launched on December 27, 2006, has been developed and is operated by the CNES, with the contribution of Austria, Belgium, Brasil, ESA, Germany, and Spain. Table 1 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/506/79
2009
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Astronomy and Astrophysics
CoRoT
104
