A Deep Photometric Survey of the Double Cluster h & χ Per

We performed a deep multi-band photometric survey of the central regions of the young (∼13 Myr) and very rich double cluster, h & χ Persei, extending the membership down to the boundary region between stellar and sub-stellar domain (0.07M Sun ). We used data from CFHT (WIRCAM and MEGACAM) in I, Y, J, H and Ks bands. To select the candidate members we produced CMDs that we compared with the isochrones, and previous known members from photometric, spectroscopical, X-ray, proper motion, disk and H alpha emission studies. We selected several thousand candidate members in h & χ Persei, down to late M dwarfs in a field of view of 20 by 20 arcmin for each cluster.