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Seismology of the Sun and Stars
Date: Wednesday, March 17, 2010
Time: 4:00 PM
Location: Hameetman Auditorium, Cahill Caltech, Building 17
Speaker: Laurent Gizon
Professor Laurent Gizon of the Max-Planck-Institut für Sonnensystemforschung will show how the solar interior can be imaged in three dimensions to infer flow velocities, structural inhomogeneities and the magnetic field in a talk.
The origin of the magnetic field in cool stars with convective envelopes, such as the sun, is not understood. Forthcoming observations of solar and stellar oscillations may provide the information that is required to constrain models of the dynamo. Gizon will show how the solar interior can be imaged in three dimensions to infer flow velocities, structural inhomogeneities, and the magnetic field. In the near future, the seismology of solar-type stars of different ages, masses and rotation periods should reveal crucial relationships between stellar internal properties (rotation, convection) and activity cycles. To give a taste of the possibilities in a sun-like star observed by CoRot.