We present a deep, wide-field optical survey of the young stellar cluster Alpha Per, in which we have discovered a large population of candidate brown dwarfs. Subsequent infrared photometric follow-up shows that the majority of them are probable or possible members of the cluster, reaching to a minimum mass of 0.035 . We have used this list of members to derive the luminosity and mass functions of the substellar population of the cluster (, when expressed in the mass spectrum form ) and compared its slope to the value measure for the Pleiades. This comparison indicates that the two cluster mass functions are, indeed, very similar.
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Barrado et al. (2002) studied this question.
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