M67 late-type stars light curves

It is increasingly well-explored for FGK stars, but requires further measurements for older ages and K-M-type stars. Recent work has shown that the behavior of stellar spindown differs significantly from prior expectations for late-type stars.

We study the 4Gyr-old benchmark open cluster M67 to explore this behavior further. We identify periodic signals in 136 lightcurves, 47 of which are from the rotation of effectively single main-sequence stars that span from early-G to mid-M type. These results connect well to prior work on M67 and extend it to much later spectral types.