Detection of Solar-like Oscillations in the G7 Giant Star xi Hya

S. Frandsen , F. Carrier , C. Aerts , D. Stello , T. Maas , M. Burnet. H. Bruntt , T. C. Teixeira , J. R. De Medeiros

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F. Bouchy H. Kjeldsen F. Pijpers J. Christensen-Dalsgaard

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classification 🌌 astro-ph

keywords stargiantmodesoscillationssolar-likeamplitudesattachedcalculations

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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.

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Detection of Solar-like Oscillations in the G7 Giant Star xi Hya

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