A photometric monitoring of bright high-amplitude delta Scuti stars. I. The double-mode pulsation of V567 Ophiuchi
Abstract
We present the first results of an observational project, which addresses the period changing behaviour of a sample of high-amplitude delta Scuti stars. In this paper we discuss the double-mode nature of V567 Ophiuchi. It was observed on 15 nights in two consecutive years in order to resolve the long-standing ambiguity related to its secondary period. A frequency analysis of almost 5000 individual single-filtered CCD V measurements resulted in two independent frequencies (f1=6.6879 d-1 and f2=11.8266 d-1) with a ratio of f1/f2=0.565. Earlier data taken from the literature were used to refine the dominant period, and the re-analysis supports the existence of the secondary period. Possible asteroseismological implications are briefly discussed.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 2002
- DOI:
- 10.1051/0004-6361:20021201
- arXiv:
- arXiv:astro-ph/0208274
- Bibcode:
- 2002A&A...394..943K
- Keywords:
-
- stars: variables: general;
- stars: oscillations;
- delta Sct;
- stars: individual: V567 Oph;
- Astrophysics
- E-Print:
- 6 pages, 3 figures, to appear in A&