Brown dwarfs in the Pleiades *
II. A deep optical and near infrared survey
Received 7 July 1997 / Accepted 5 February 1998
The brown dwarf population in the Pleiades cluster has been probed in a deep 850 arcmin2 RIJK survey. The survey is complete to in 76 % of the area and to in the remaining 24 %. Photometry of 30 previously known members is presented together with 8 new candidates, four of which are below the brown dwarf limit. The faintest one is the lowest mass brown dwarf candidate found hitherto in the Pleiades (, 0.04 ). The derived Pleiades luminosity function is compared to the most recent theoretical mass-luminosity relations and is consistent with a power-law index in the mass function between 0 and 1 to the limit of this survey.
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) 1998
Online publication: April 20, 1998