Brown Dwarfs in the Pleiades *
A deep IJK survey
Received 15 October 1996 / Accepted 15 November 1996
An area large enough (180 ) 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 0.01 for a cluster age of 70 Myr and 0.035 for 120 Myr. The result is consistent with previous investigations at higher masses that the brown dwarf initial mass function is a , 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 (age 120Myr).
Key words: stars: late-type stars: low-mass, brown dwarfs stars: luminosity function, mass function open clusters and associations: individual: Pleiades
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© European Southern Observatory (ESO) 1997
Online publication: June 5, 1998