Rot. velocities of APOGEE stars in Kepler field

We find a detection threshold of 10km/s, which allows us to explore the spindown of intermediate-mass stars leaving the main sequence, merger products, young stars, and tidally synchronized binaries. We see a clear distinction between blue stragglers and the field turnoff in {alpha}-rich stars, with a sharp rapid rotation cutoff for blue stragglers consistent with the Kraft break.

We also find rapid rotation and radial velocity variability in a sample of red straggler stars, considerably cooler than the giant branch, lending credence to the hypothesis that these are active, tidally synchronized binaries. We see clear evidence for a transition between rapid and slow rotation on the subgiant branch in the domain predicted by modern angular momentum evolution models. We find substantial agreement between the spectroscopic and photometric properties of KIC targets added by Huber+ (2014, J/ApJS/211/2) based on Two Micron All Sky Survey photometry.