Do exoplanets spin up their host stars

We have collected initial evidence that tidal interaction between a latetypestar and its closein, massive planet can lead to a spinup of the host star. Wepropose to explore this further by studying a small sample of proper motionpairs in which one of the stars is orbited by a Hot Jupiter. We will determineif the activityestimated age appears to be strongly different for the twostars, which would indicate a tidal spin up of the Hot Jupiter host star. Wepropose to observe 4 such systems with Chandra/ACISS, and to perform a similarobservation of one additional system with large angular separation usingXMMNewton/EPIC. Thetotal proposed exposure times are 141 ks (Chandra) and 38 ks (XMM). truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]