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Observatoire Midi-Pyrénées |  |
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Observatoire Midi-Pyrénées | |
| HAL: hal-00596764, version 1 |
| arXiv: 1105.5586 |
| DOI: 10.1103/PhysRevLett.107.121101 |
| Detailed view |  Export this paper |
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| Physical Review Letters 107 (2011) 121101 |
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| Regular modes in rotating stars |
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| Michael Pasek 1, 2Bertrand Georgeot 1 |
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| (2011-09-14) |
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| 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. |
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| 1: | Laboratoire de Physique Théorique - IRSAMC (LPT) |
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CNRS : UMR5152 – Université Paul Sabatier [UPS] - Toulouse III |
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| 2: | Institut de recherche en astrophysique et planétologie (IRAP) |
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CNRS : UMR5277 – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées |
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| 3: | Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) |
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CNRS : UMR8109 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot |
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| Information et Chaos Quantiques |
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| Subject | : | Physics/Astrophysics/Solar and Stellar Astrophysics Sciences of the Universe/Astrophysics/Solar and Stellar Astrophysics Nonlinear Sciences/Chaotic Dynamics |
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| Fulltext link: |
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| http://fr.arXiv.org/abs/1105.5586 |
| hal-00596764, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00596764 | |
| oai:hal.archives-ouvertes.fr:hal-00596764 | |
| From: Bertrand Georgeot | |
| Submitted on: Monday, 30 May 2011 10:16:36 | |
| Updated on: Friday, 11 January 2013 14:35:25 | |
