Extending the Canada-France brown dwarfs survey to the near-infrared: first ultracool brown dwarfs from CFBDSIR

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Table 5:

Spectral indices of ultracool brown dwarfs.
Object	Sp. Type	H₂O-H	CH₄-H	NH₃-H
Gl570D	T7.5	0.208	0.137	0.672
2MASS0415	T8	0.183	0.104	0.625
WOLF940B	T8+/Y?	0.141	0.091	0.537
CFBDSIR1458 (1)	T8+/Y?	0.149	0.046	0.568
CFBDSIR1458 (2)	T8+/Y?	0.146	0.087	0.582
ULAS0034	T8+/Y?	0.133	0.096	0.516
CFBDS0059	T8+/Y?	0.119	0.084	0.526
ULAS1335	T8+/Y?	0.114	0.077	0.564

Notes. The 2 values for CFBDSIR1458 were derived using a median-binning of the spectra over (1) 17 pixels (resolution $\sim$ 170); (2) 6 pixels (resolution 500). The other values are from Burningham et al. (2008,2009); Delorme et al. (2008a); Burgasser et al. (2006); Warren et al. (2007).

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