A method to detect p-mode oscillations in solar-like star signals
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_signal /sigma_signal +noise < 1/25.
- Publication:
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Astronomy and Astrophysics
- Pub Date:
- December 2002
- DOI:
- 10.1051/0004-6361:20021441
- Bibcode:
- 2002A&A...396..745R
- Keywords:
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- methods: data analysis;
- stars: oscillations