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

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

2009-01-23

arxiv.org/abs/0901.3632v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

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

Scientific paper

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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