Richard Townsend, University of Wisconsin-Madison, "The Yin and Yang of Slowly-Pulsating B Stars: Asteroseismology and Angular Momentum Redistribution"
Astronomy colloquium: Jan 25 @ 3:30 PM, ERC 161
During their main-sequence evolution, almost all B-type stars will pass through a phase where they are unstable toward oscillation in one or more global internal gravity waves ('g modes'). The g modes, driven by iron and nickel opacity in the stars' outer envelopes, generate surface temperature and velocity changes with periodicities on the order of days.