AAS 206th Meeting, 29 May - 2 June 2005
Session 36 Star Clusters
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

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[36.05] Rotation periods for solar- and late-type stars in selected open clusters

S.A. Barnes (Lowell Observatory)

Rotation period observations are presented for solar- and late-type stars in a series of open clusters. The morphology of the observations is striking, suggesting that rotating stars can be classified into disjoint equivalence classes, each of which has a distinctive stellar mass and age dependence. These dependences suggest a particular scenario for the rotational evolution of stars that explains the dispersion observed in young star clusters and the lack thereof in older ones. (NSF is gratefully acknowledged for support of this work.)

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Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.