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29 March 2024
 
  » arxiv » astro-ph/0306056

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Oscillations in Arcturus from WIRE photometry
A. Retter ; T. Bedding ; D.L. Buzasi ; H. Kjeldsen ; L.L. Kiss ;
Date 3 Jun 2003
Journal Astrophys.J. 591 (2003) L151-L154
Subject astro-ph
AffiliationUniversity of Sydney), D.L. Buzasi (US Air Force Academy), H. Kjeldsen (University of Aarhus) and L.L. Kiss (University of Sydney
AbstractObservations 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.
Source arXiv, astro-ph/0306056
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