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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.
Astronomy Colloquium
What sets the Maximum Spin Rate of Neutron Stars?
- Time: 3:30 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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