On the likelihood-ratio test applied in asteroseismology for mode identification

Details On the likelihood-ratio test applied in asteroseismology for mode identification On the likelihood-ratio test applied in asteroseismology for mode identification

2010-03-31

arxiv.org/abs/1003.6076v3

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 3 figures, Proceedings of the HELAS-IV International Conference, Submitted to Astronomische Nachrichten

Scientific paper

The identification of the solar-like oscillation modes, as measured by asteroseismology, is a necessary requirement in order to infer the physical properties of the interior of the stars. Difficulties occur when a large number of modes of oscillations with a low signal-to-noise ratio are observed. In those cases, it is of common use to apply a likelihood-ratio test to discriminate between the possible scenarios. We present here a statistical analysis of the likelihood-ratio test and discuss its accuracy to identify the correct modes. We use the AsteroFLAG artificial stars, simulated over a range of magnitude, inclination angle, and rotation rate. We show that the likelihood-ratio test is appropriate up to a certain magnitude (signal-to-noise ratio).

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