Direct numerical simulations of internal wave attractors

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• Boris Dintrans (Laboratoire Astrophysique de Toulouse)
• Monday 18 January 2010, 16:00-17:00
• MR14, DAMTP, Pav. F.

If you have a question about this talk, please contact Laurène Jouve.

I will present the first simulations of internal wave attractors done with the Pencil Code. Internal waves are gravity waves that propagate only in stably-stratified regions like the radiative zones of stars. When the pulsating star rotates rapidly (rotation period of the same order than the oscillation one), a fascinating feature appears as the wave energy can be focused along attractors. As a consequence, the resulting oscillation spectrum is a mixture of normal eigenmodes and singular ones depending on the associated orbit of characteristics (i.e. ergodic or focused). I will review both experiments and numerical simulations of this phenomenon that appears in non-separable geometries.

This talk is part of the DAMTP Astrophysics Seminars series.

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