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SUMMARY:Impact of an axisymmetric magnetic field on gravity waves in rapid
 ly rotating stars - Vincent Prat (CEA Saclay)
DTSTART:20181119T140000Z
DTEND:20181119T150000Z
UID:TALK109597@talks.cam.ac.uk
CONTACT:Dr William Béthune
DESCRIPTION:Internal gravity waves provide us with a unique way to probe t
 he stellar interior of intermediate-mass and massive stars. Those waves ar
 e also able to transport angular momentum. However\, the propagation\, the
  frequencies of waves and the transport they induce may be strongly affect
 ed by rotation and the presence of a magnetic field. For slow rotators\, r
 otation can be taken into account using perturbative methods.\nFor rapid r
 otators\, which is the case of many early-type pulsators such as gamma Dor
 adus\, delta Scuti\, SPB and Be stars\, such methods fail\, and the eigenv
 alue problem is fully 2D. To investigate the effect of an axisymmetric mag
 netic field on gravito-inertial waves\, we use the ray theory\, which desc
 ribes small-wavelength waves as propagating rays. This method allows us to
  efficiently explore the parameter space and identify different wave behav
 iours in presence of a magnetic field. 
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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