Pulsational frequencies of the eclipsing δ Scuti star
HD 172189. Results of the STEPHI XIII campaign
Context: The eclipsing δ Scuti star
Aims: The detection of pulsation modes is the first step in the asteroseismological study of the star. Further, the calculation of the orbital parameters of the binary system allows us to make a dynamical determination of the mass of the star, which works as an important constraint to test and calibrate the asteroseismological models.
Methods: We performed a detailed frequency analysis of 210 hours of photometric data of
Results: We have identified six pulsation frequencies with a confidence level of 99% and a seventh with a 65% confidence level of 65%, in the range between 100-300 μHz. In addiction, three eclipses were observed during the campaign, allowing us to improve the determination of the orbital period of the system.
Astronomy and Astrophysics
- Pub Date:
- June 2007
- stars: oscillations;
- stars: variables: δ Sct;
- stars: binaries: eclipsing;
- stars: individual: HD 172189;
- 6 pages, 7 figures