Young Cool Stars Divided on the Issue of Rotation

Details Young Cool Stars Divided on the Issue of Rotation Young Cool Stars Divided on the Issue of Rotation

2008-11-09

arxiv.org/abs/0811.1316v1

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures

Scientific paper

10.1063/1.3099279

We present the results of a combination of new stellar rotation periods and extensive information about membership in the young open clusters M35 and M34. The observations show that late-type members of both clusters divide into two distinct groups, each with a different dependence of rotation on mass (color). We discuss these new results in the context of existing rotation data for cool stars in older clusters, with a focus on the dependence of rotation on mass and age. We mention briefly tests of rotation as an "astronomical clock" (gyrochronology), and our plans to use the Kepler space mission to push observations of stellar rotation periods beyond the age of the Hyades and the Sun.

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