Searching for p-modes in MOST Procyon data: another view
- Autor(en)
- Frederic Baudin, T Appourchaux, Rainer Kuschnig
- Abstrakt
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(en)
- Institut für Astrophysik
- Externe Organisation(en)
- Université Paris XI - Paris-Sud
- Journal
- Astronomy & Astrophysics
- Band
- 478
- Seiten
- 461-465
- Anzahl der Seiten
- 5
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361:20077683
- Publikationsdatum
- 2008
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/3ec10291-7ffc-4862-9773-2ed0e0748968