Bibcode
Roca-Cortés, T.; Régulo, C.
Referencia bibliográfica
In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000, Santa Cruz de Tenerife, Tenerife, Spain. Edited by A. Wilson, Scientific coordination by P. L. Pallé. ESA SP-464, Noordwijk: ESA Publications Division, ISBN 92-9092-697-X, 2001, p. 447 - 450
Fecha de publicación:
1
2001
Número de citas
3
Número de citas referidas
2
Descripción
The necessity of finding a signal buried in noise is a common problem in
astrophysics where noise limited observations are usually preceding
interesting discoveries. In particular we are interested in the
detection of p-mode oscillation frequencies of solar-like stars which,
at least for the moment, have a very poor S/N ratio. In this work, it is
shown that to find this type of signals in time series observations with
a S/N defined as
σsignal/(σsignal+noise) as small as
0.0012 is indeed possible. The method uses the p-mode frequency
signature in the asymptotic regime (n>>l) where the modes of like
l are "almost" uniformly separated in frequency. The departure from an
exact frequency spacing and the lowest signal's amplitude detected are
trade off parameters.