Anchoring the Chromospheric Activity$-$Rotation Relation: A Study of the Pleiades and Group X

A. Núñez, M. A. Agüeros, J. L. Curtis +1

We present a study of the rotation and the chromospheric H$\alpha$ activity of low-mass stars in the $\approx$120 Myr-old Pleiades and the $\approx$400 Myr-old Group X open clusters. We…