[6.02] Constraints on Spiral Modes Propagating in the Solar Neighborhood

34th Meeting of the AAS Division on Dynamical Astronomy, May 2003
6 Poster Papers
Posters, Monday, May 5, 2003, 8:00pm,

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[6.02] Constraints on Spiral Modes Propagating in the Solar Neighborhood

A. Quillen (U. Rochester)

Hipparcos has revealed a lot of structure in the solar neighborhood stellar velocity distribution. Clumps seen in blue stars are often also present in the older stars, suggesting that these clumps are not due to evaporating clusters but are due to coherent spiral modes. I will place constraints on the pattern speeds and perturbation strengths of spiral modes which could be responsible for this structure.

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