Issue |
A&A
Volume 394, Number 3, November II 2002
|
|
---|---|---|
Page(s) | 943 - 948 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20021201 | |
Published online | 21 October 2002 |
A photometric monitoring of bright high-amplitude δ Scuti stars
I. The double-mode pulsation of V567 Ophiuchi
1
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, l.kiss@physx.u-szeged.hu
Received:
12
July
2002
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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