2006ApJ...647L.155F

We present some results from a UVI photometric study of a field in the young open cluster NGC 2264 that is aimed, in part, at testing whether accretion in pre-main-sequence stars is linked to rotation. We confirm that U-V excess is well correlated with the Hα equivalent width for the stars in our sample. We show that for the more massive stars in the cluster sample (roughly 0.4-1.2 M_☉), there is also a significant association between U-V excess and rotation, in the sense that slow rotators are more likely to show excess U-band emission and variability. This constitutes significant new evidence in support of the disk-locking paradigm.