Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-05-27
Phys. Rev. Lett. 107, 121101 (2011)
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
5 pages, 4 figures, discussion added
Scientific paper
10.1103/PhysRevLett.107.121101
Despite more and more observational data, stellar acoustic oscillation modes are not well understood as soon as rotation cannot be treated perturbatively. In a way similar to semiclassical theory in quantum physics, we use acoustic ray dynamics to build an asymptotic theory for the subset of regular modes which are the easiest to observe and identify. Comparisons with 2D numerical simulations of oscillations in polytropic stars show that both the frequency and amplitude distributions of these modes can accurately be described by an asymptotic theory for almost all rotation rates. The spectra are mainly characterized by two quantum numbers; their extraction from observed spectra should enable one to obtain information about stellar interiors.
Georgeot Bertrand
Lignières François
Pasek Matthew
Reese Daniel R.
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