Fig. 1
Colour−magnitude diagram of the M−L−T spectrum (small grey circles). All brown dwarfs with known parallax in the BAM sample are overplotted, with red representing the L dwarfs, yellow the L–T transition dwarfs, and blue the T dwarfs (see Tables 1 and 2). Half spectral types have been rounded down in the study. The photometry and parallaxes for the field M−L−T objects are from Dupuy & Liu (2012).
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