| Issue |
A&A
Volume 394, Number 1, October IV 2002
|
|
|---|---|---|
| Page(s) | L5 - L8 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20021281 | |
| Published online | 04 October 2002 | |
Letter to the Editor
Detection of Solar-like oscillations in the G7 giant star ξ Hya*
1
Institut for Fysik og Astronomi, Aarhus Universitet, Universitetsparken, 8000 Aarhus C, Denmark
2
Observatoire de Genève, 51 chemin de Maillettes, 1290 Sauverny, Switzerland e-mail: fabien.carrier@obs.unige.ch
3
Katholieke Universiteit Leuven, Instituut voor Sterrenkunde, Celestijnenlaan 200 B, 3001 Leuven, Belgium e-mail: conny@ster.kuleuven.ac.be
4
Centro de Astrofísica da Universidade do Porto, Portugal
5
Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, Brazil
6
Teoretisk Astrofysik Center, Danmarks Grundforskningsfond
Corresponding author: S. Frandsen, srf@ifa.au.dk
Received:
17
June
2002
Accepted:
3
September
2002
We report the firm discovery of solar-like oscillations in a
giant star. We monitored the star ξ Hya (G7III) continuously during one
month with the CORALIE spectrograph attached to the 1.2 m Swiss Euler
telescope. The 433 high-precision radial-velocity measurements clearly reveal
multiple oscillation frequencies in the range 50–130 μHz, corresponding
to periods between 2.0 and 5.5 hours. The amplitudes of
the strongest modes are
slightly smaller than 
. Current model calculations are compatible with
the detected modes.
Key words: asteroseismology / solar type oscillations / giant stars
© ESO, 2002
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