Regular modes in rotating stars
arXiv:1105.5586 · doi:10.1103/PhysRevLett.107.121101
Abstract
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.
5 pages, 4 figures, discussion added
References in corpus (7)
- Kepler Mission Design, Realized Photometric Performance, and Early Science
- Imaging the Surface of Altair
- Acoustic oscillations of rapidly rotating polytropic stars. II. Effects of the Coriolis and centrifugal accelerations
- Acoustic oscillations in rapidly rotating polytropic stars I. Effects of the centrifugal distortion
- Regular patterns in the acoustic spectrum of rapidly rotating stars
- Mode identification in rapidly rotating stars
- Asymptotic boundary layer method for unstable trajectories: Semiclassics for individual scar wavefunctions
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