Evidence for Solar-like Oscillations in Arcturus (Alpha Boo)
Abstract
Observations of the red giant Arcturus (Alpha Boo) obtained with the star tracker on the Wide Field Infrared Explorer (WIRE) satellite during a baseline of 19 successive days in 2000 July-August are analysed. The power spectrum has a significant excess of power at low-frequencies. The highest peak is at about 4.1 micro-Hz, which is in agreement with the ground-based radial velocity and photometry study of Belmonte et al. (1990a; 1990b). The variability of Arcturus can be explained by sound waves, but it is not clear whether these are coherent p-mode oscillations.
Cite
@article{arxiv.astro-ph/0208518,
title = {Evidence for Solar-like Oscillations in Arcturus (Alpha Boo)},
author = {Alon Retter and Timothy R. Bedding and Derek Buzasi and Hans Kjeldsen},
journal= {arXiv preprint arXiv:astro-ph/0208518},
year = {2007}
}
Comments
4 pages, 1 Latex file, 3 .eps figures, uses 2 Kluwer .sty files (klucite.sty, klups.sty). To appear in `Asteroseismology Across the HR Diagram', Kluwer (Astrophysics and Space Science Series, eds. Thompson M.J., Cunha M.S., Monteiro M.J.P.F.G., 2003