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Astrophysics and Space Science Proceedings
We present wide-field ground based photometry for the Galactic globular cluster M92. Data were collected in the SDSS bands (u , g , r , i , z ) with the MegaCam@CFHT. We confirm the occurrence of cluster stars beyond the tidal radius. Moreover, we find that the ratio between the Horizontal Branch (HB) stars and Main Sequence (MS) stars across the turn-off region clearly decreases by a factor of two when moving from the centre to the outermost regions of the cluster.doi:10.1007/978-3-642-22113-2_29 fatcat:mrnduljg75gllafqorjejfja2y