Solar-Like Oscillations in beta Hydri: Evidence for Short-Lived High-Amplitude Oscillations
classification
🌌 astro-ph
keywords
betaevidencehigh-amplitudeoscillationsshort-liveduclesaccurateasteroseismology
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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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