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Events on Tuesday, November 10th, 2009

Chaos & Complex Systems Seminar
The stability of oscillators
Time: 12:05 pm
Place: 5310 Chamberlin (Refreshments will be served)
Speaker: George Hrabovsky, Madison Area Science and Technology
Abstract: By converting an oscillator equation to a well-known special function equation, it is possible to apply a graphical method of analysis to determine if an oscillation is stable, and to locate where solutions become unphysical when it is not stable.
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Astronomy Colloquium
What sets the Maximum Spin Rate of Neutron Stars?
Time: 3:30 pm - 5:00 pm
Place: 3425 Sterling Hall
Speaker: Ira Wasserman, Cornell University, Astronomy Department
Abstract: The fastest rotating neutron star has a spin frequency of 716 Hz, well below the maximum allowed by stability in general. The accepted view is that fast spin results from accretion, but the R mode instability of a rotating neutron star seems to prevent spin up to frequencies as high as the fastest observed. What is going on?
Host: Professor Ellen Zweibel
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