Stellar Spins in the Pleiades, Praesepe, and M35 Open Clusters
  We analyze spectroscopic and photometric data to determine the projected
inclinations of stars in three open clusters: the Pleiades, Praesepe, and M35.
We determine the $\sin i$ values of 42, 35, and 67 stars in each cluster,
respectively, and from their distributions we find that isotropic spins and
moderate alignment are both consistent with the Pleiades and Praesepe data.
While it is difficult to distinguish between these scenarios for a single
cluster, an ensemble of such distributions may facilitate a distinction. The
M35 inclination distribution is most consistent with a superposition of
isotropic and anisotropic spins, the source of which could be systematic error
or a physical grouping of aligned stars. We also study internal cluster
kinematics using radial velocities and proper motions. Our kinematics analysis
reveals significant plane-of-sky rotation in Praesepe, with a mean velocity of
$0.132 \pm 0.022$ km s$^{-1}$ in a clockwise direction.
