Solar-Like Oscillations in β Hydri: Evidence for Short-Lived High-Amplitude Oscillations

Authors :: François Bouchy
Fabien Carrier
T. R. Bedding
R. P. Butler
H. Kjeldsen
Francesco Kienzle
C. G. Tinney
Ivan K. Baldry
Simon J. O'Toole
G. W. Marcy
Source :: International Astronomical Union Colloquium. 185:464-467
Publication Year :: 2002
Publisher :: Cambridge University Press (CUP), 2002.
Abstract: Velocity measurements of the G2 subgiant β Hyi with both UCLES and CORALIE show a clear excess of power centred at 1.0 mHz. In the UCLES data we find evidence for a short-lived, high-amplitude oscillation event. If confirmed as a feature of subgiants, such ‘starquakes’ would make it harder to measure accurate mode frequencies and perform asteroseismology.

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