Searching for p-modes in MOST Procyon data: another view
- Author(s)
- Frederic Baudin, T Appourchaux, Rainer Kuschnig
- Abstract
Context: Photometry of Procyon obtained by the MOST satellite in 2004 has been searched for p modes by several groups, with sometimes contradictory interpretations. Aims: We explore two possible factors that complicate the analysis and may lead to erroneous reports of p modes in these data. Methods: Two methods are used to illustrate the role of subtle instrumental effects in the photometry: time-frequency analysis, and a search for regularly spaced peaks in a Fourier spectrum based on the echelle diagramme approach. Results: We find no convincing evidence of a p-mode signal in the MOST Procyon data. We can account for an apparent excess of power close to the p-mode frequency range and signs of structure in an echelle diagramme in terms of instrumental effects.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Université Paris XI - Paris-Sud
- Journal
- Astronomy & Astrophysics
- Volume
- 478
- Pages
- 461-465
- No. of pages
- 5
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361:20077683
- Publication date
- 2008
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/3ec10291-7ffc-4862-9773-2ed0e0748968