1997A&A...322..455F

An area large enough (180arcmin²) to put constraints on a possible low mass brown dwarf population in the Pleiades has been surveyed to very faint magnitudes in I, J and K. The completeness limit, I=21.6, corresponds to a mass of 0.01M_☉ for a cluster age of 70Myr and 0.035M_☉ for 120Myr. The result is consistent with previous investigations at higher masses that the brown dwarf initial mass function is a m^–1, or even less steep, power law. Thus low mass brown dwarfs cannot contribute significantly to the Pleiades' mass. One new possible Pleiades member was found, mass ∼0.08M_☉ (age 120Myr).