Oscillations in Arcturus from WIRE photometry
Astrophysics
2009-11-07 v2
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 amplitude spectrum has a significant excess of power at low-frequencies. The highest peak is at about 4.1 micro-Hz (2.8 d), which is in agreement with previous ground-based radial velocity studies. The variability of Arcturus can be explained by sound waves, but it is not clear whether these are coherent p-mode oscillations or a single mode with a short life-time.
Keywords
Cite
@article{arxiv.astro-ph/0306056,
title = {Oscillations in Arcturus from WIRE photometry},
author = {A. Retter and T. Bedding and D. L. Buzasi and H. Kjeldsen and L. L. Kiss},
journal= {arXiv preprint arXiv:astro-ph/0306056},
year = {2009}
}
Comments
6 pages, 1 Latex file, 4 .eps figures, 2 .sty files, ApJL, 591, L151 See erratum (astro-ph/0308424)