By collecting optical and infrared photometry and low-resolution spectroscopy, we have identified a large number of low-mass stars and brown dwarf candidates belonging to the young cluster (~5Myr) associated with the binary star {lambda} Orionis. The lowest mass object found is an M8.5 with an estimated mass of 0.02M_{Sun} (~0.01M{Sun}_ for objects without spectroscopic confirmation). For those objects with spectroscopy, the measured strength of the H{alpha} emission line follows a distribution similar to other clusters with the same age range, with larger equivalent widths for cooler spectral types.

Cone search capability for table J/ApJ/610/1064/table1 (Positions and optical photometric data for our {lambda} Orionis candidate members)

Cone search capability for table J/ApJ/610/1064/table2 (Positions and IR photometry from 2MASS for our {lambda} Orionis candidate members)