J-Band Underluminosity of SIMP J2154-1055

This figure shows the expected position of SIMP J2154-1055 in a spectral type-absolute magnitude diagram (from Liu et al. 2013), using the statistical distance prediction from BANYAN II (Gagné et al. 2014a). It can be seen that SIMP J2154-1055 is expected to be under luminous as compared to old, field L dwarfs. This is consistent with other young L4 dwarfs, which are inflated, but more dusty ; the latter effect dominates on their J-band luminosity. Also due to its enhanced dust, it has redder than normal NIR colors.

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