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

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

2002-02-26

arxiv.org/abs/astro-ph/0202471v1

Astronomy and Astrophysics

Astrophysics

4 pages, latex, eps figures, To appear in Proc. IAU Colloq. 185: "Radial and Nonradial Pulsations as Probes of Stellar Physics

Scientific paper

Velocity measurements of the G2 subgiant beta 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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