Optimizing Weights for the Detection of Stellar Oscillations: Application to alpha Centauri A and B, and beta Hydri

2009/01/23 by T. Arentoft, H. Kjeldsen, Arentoft, T. +3 · 1 citation
Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.0901.3632

9 pages, 10 figures, proc. SOHO XXI/GONG 2008

arxiv created 2009/01/23 · arxiv updated 2009/12/01

Abstract

We have recently developed a new method for adjusting weights to minimize sidelobes in the spectral window. Here we show the results of applying this method to published two-site velocity observations of three stars (alpha Cen A, alpha Cen B and beta Hyi). Compared to our previous method of minimizing sidelobes, which involved adjusting the weights on a night-by-night basis, we find a significant improvement in frequency resolution. In the case of alpha Cen A, this should allow the detection of extra oscillation modes in the data.

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• A MULTI-SITE CAMPAIGN TO MEASURE SOLAR-LIKE OSCILLATIONS IN PROCYON. II. MODE FREQUENCIES

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