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This Week at Physics

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Event Number 4538

  Monday, May 1st, 2017

BAUTZ LECTURE
Physics Of The Stochastic Excitation Of Stellar Modes
Time: 12:00 pm
Place: 4421 Sterling Hall
Speaker: Peter Goldreich, CALTECH
Abstract:
Internal properties of stars with convective envelopes are determined by analyzing the frequencies of their acoustic modes. After a brief introduction to observational techniques, I will describe the emission, absorption, and scattering of sound inside a star and how the waves ultimately escape through its photosphere. Then I will demonstrate how these processes account for some remarkable regularities revealed by observations of solar modes across 3 orders of magnitude in angular degree.

Host: UW Astronomy Department
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