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Table 2
Value of the NIR spectral indices (as defined by Burgasser et al. 2006; Warren et al. 2007; Delorme et al. 2008a) for some of the latest known brown dwarfs.
| Object | Sp. type | H2O-J | Wj | CH4-J | H2O-H | CH4-H | NH3-H | CH4-K | K/J |
|
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| CFBDSIR2149 | T7/T7.5 | 0.067 | 0.404 | 0.198 | 0.222 | 0.138 | 0706 | 0.133 | 0.199 |
| ± 0.003 | ± 0.004 | ± 0.004 | ± 0.007 | ± 0.006 | ± 0.015 | ± 0.023 | ± 0.003 | ||
| T7.5 | T7 | T8 | T7 | T7.5 | – | T6.5 | – | ||
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| SDSS1504+10 | T7 | 0.082 | 0.416 | 0.342 | 0.241 | 0.184 | 0.668 | 0.126 | 0.132 |
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| Gl570D | T7.5 | 0.059 | 0.330 | 0.208 | 0.206 | 0.142 | 0.662 | 0.074 | 0.081 |
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| 2M0415 | T8 | 0.030 | 0.310 | 0.172 | 0.172 | 0.106 | 0.618 | 0.067 | 0.133 |
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| Ross458C | T8+ | 0.007 | 0.269 | 0.202 | 0.219 | 0.107 | 0.701 | 0.082 | 0.192 |
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| Wolf940B | T8+ | 0.030 | 0.272 | 0.030 | 0.141 | 0.091 | 0.537 | 0.073 | 0.111 |
Notes. Values were derived using spectra from this article and from Burgasser et al. (2006), Delorme et al. (2008a), Burningham et al. (2009, 2010).
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