Volume 394, Number 3, November II 2002
|Page(s)||943 - 948|
|Section||Interstellar and circumstellar matter|
|Published online||21 October 2002|
A photometric monitoring of bright high-amplitude δ Scuti stars
I. The double-mode pulsation of V567 Ophiuchi
Department of Experimental Physics and Astronomical Observatory, University of Szeged, Dóm tér 9, Szeged 6720, Hungary
2 Hungarian Eötvös Fellowship, Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain
3 Department of Optics and Quantum Electronics, University of Szeged, POB 406, Szeged 6701, Hungary
Corresponding author: L. L. Kiss, firstname.lastname@example.org
Accepted: 13 August 2002
We present the first results of an observational project, which addresses the period changing behaviour of a sample of high-amplitude δ 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 ( d-1 and d-1) with a ratio of . 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.
Key words: stars: variables: general / stars: oscillations / δ Sct / stars: individual: V567 Oph
© ESO, 2002
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