Detection of solar - like oscillations in the G7 giant star xi Hya

We report the firm discovery of solar-like oscillations in a giant star. We monitored the star xi Hya (G7III) continuously during one month with the CORALIE spectrograph attached to the 1.2m Swiss Euler telescope. The 433 high-precision radial-velocity measurements clearly reveal multiple oscillation frequencies in the range 50 - 130 uHz, corresponding to periods between 2.0 and 5.5 hours. The amplitudes of the strongest modes are slightly smaller than 2 m/s. Current model calculations are compatible with the detected modes.

References(9)

Figures(0)

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•
e-Print:
- astro-ph/0012417
•
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Evidence for solar-like oscillations in Arcturus (Alpha Boo)

Alon Retter
(
- Sydney U.
)
,
Timothy R. Bedding
(
- Sydney U.
)
,
Derek Buzasi
(
- U.S. Air Force Academy
)
,
Hans Kjeldsen
(
- Aarhus U.
)

e-Print:
- astro-ph/0208518