EDP Sciences
Free access
Issue
A&A
Volume 396, Number 2, December III 2002
Page(s) 745 - 751
Section Instruments, observational techniques and data processing
DOI http://dx.doi.org/10.1051/0004-6361:20021441


A&A 396, 745-751 (2002)
DOI: 10.1051/0004-6361:20021441

A method to detect p-mode oscillations in solar-like star signals

C. Régulo1, 2 and T. Roca Cortés1, 2

1  Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
2  Dpto. de Astrofísica, Universidad de La Laguna, La Laguna, 38206, Tenerife, Spain
    e-mail: trc@astro.iac.es

(Received 24 April 2002 / Accepted 18 September 2002 )

Abstract
A good example of finding a signal buried in noise, a common problem in Astrophysics, is the search for stellar oscillations in the acoustic power spectrum of solar-like stars. In this work it is shown that it is possible to find this type of signal in the power spectrum of stellar oscillations if the peaks are "almost" equally spaced in frequency, as the asymptotic theory for acoustic modes predicts. This signature of the power spectra of the p-mode oscillations in solar-like stars is used to design a method that allows the identification of the signal even when this signal is completely buried in noise, $\sigma_{\rm signal}/\sigma_{\rm signal+noise} < 1/25$.


Key words: methods: data analysis -- stars: oscillations

Offprint request: C. Régulo, crr@astro.iac.es




© ESO 2002