Solar-Like Oscillations in beta Hydri: Evidence for Short-Lived High-Amplitude Oscillations
Astrophysics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/0202471,
title = {Solar-Like Oscillations in beta Hydri: Evidence for Short-Lived High-Amplitude Oscillations},
author = {T. R. Bedding and H. Kjeldsen and I. K. Baldry and F. Bouchy and R. P. Butler and F. Carrier and F. Kienzle and G. W. Marcy and S. J. O'Toole and C. G. Tinney},
journal= {arXiv preprint arXiv:astro-ph/0202471},
year = {2007}
}
Comments
4 pages, latex, eps figures, To appear in Proc. IAU Colloq. 185: "Radial and Nonradial Pulsations as Probes of Stellar Physics", edited by C. Aerts, T.R. Bedding and J. Christensen-Dalsgaard, ASP Conf. Series, Vol. 259, p. 464