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We present a new, BVIc photometric survey of the young open cluster IC4665,which improves on previous studies of this young cluster by incorporating arigorous standardization procedure, thus providing high-fidelity colors andmagnitudes for cluster members. We use this new photometric dataset toreevaluate the properties (age and distance) of IC4665. Namely, using astatistical approach incorporating Tau^2 CMD modeling, we measure apre-main-sequence isochrone age and distance of 36+-9 Myr and 360+-12 pc, aswell as a upper-main-sequence turn-off age and distance of 42+-12 Myr and357+-12 pc. These ages and distances are highly dependent on the isochronemodel and color used for the fitting procedure, with a possible range of ~10-20Myr in age and ~20 pc in distance. This spread in calculated ages and distancesseen between colors and models is likely due to limitations in the individualmembership catalogs and/or systematic differences in the predicted stellarparameters from the different sets of models. Interestingly, when we comparethe isochrone ages for IC4665 to the published lithium depletion boundary age,28+-5 Myr, we observe that this cluster does not appear to follow the trend ofisochrone ages being 1.5 times smaller than lithium depletion boundary ages. Inaddition, comparing the overall magnetic activity (X-ray and H-alpha emission)in IC4665 with other well studied open clusters, we find the observed activitydistributions for this young cluster are best characterized by assuming an ageof 30-40 Myr, thus in agreement with our pre-main-sequence and turn-offisochrone ages for IC4665. Overall, although some age discrepancies do exist,particularly in the ages measured from pre-main-sequence isochrones, the rangeof possible IC4665 ages derived from the various dating techniques employedhere is relatively small compared to that found for other well studied openclusters.

Employing a New BVIc Photometric Survey of IC 4665 to Investigate the Age of this Young Open Cluster