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Table 3
Spectral indices and equivalent widths.
| Object | H2O | H2O | H2O 2 | Na | EW (Na I) | EW(K I) | EW(K I) | EW(K I) | EW(K I) |
| 1.3 μm | 1.5 μm | 1.138 μm | 1.169 μm | 1.177 μm | 1.243 μm | 1.253 μm | |||
| (Å) | (Å) | (Å) | (Å) | (Å) | |||||
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| 2M1207 A | 0.73 (8.83) | 1.08 (8.60) | 0.93 (7.87) | 1.07 | 5.08 ± 0.20 | 1.36 ± 0.11 | 2.44 ± 0.11 | 1.67 ± 0.06 | 0.92 ± 0.09 |
| OTS 44 | 0.69 (10.05) | 1.11 (9.69) | 0.86 (9.37) | 1.12 | 3.74 ± 0.51 | 0.53 ± 0.19 | 2.83 ± 0.19 | 1.99 ± 0.11 | 0.59 ± 0.19 |
| KPNO Tau 4 | 0.64 (11.58) | 1.11 (9.69) | 0.83 (10.01) | 1.10 | 2.88 ± 0.29 | 0.30 ± 0.23 | 1.54 ± 0.24 | 1.71 ± 0.13 | -0.49 ± 0.19 |
| 2M0141 | 0.67 (10.67) | 1.13 (10.41) | 0.83 (10.01) | 1.19 | 3.47 ± 0.57 | 2.62 ± 0.26 | 5.19 ± 0.25 | 1.78 ± 0.20 | 1.88 ± 0.23 |
| TWA 5B | 0.74 (8.52) | 1.06 (7.88) | 0.92 (8.08) | 1.09 | 4.40 ± 0.28 | 0.85 ± 0.16 | 2.44 ± 0.20 | 1.70 ± 0.10 | 1.12 ± 0.11 |
| Cha 1109 | 0.68 (10.36) | 1.14 (10.78) | 0.85 (9.58) | – | 1.38 ± 0.80 | 0.28 ± 0.58 | 3.57 ± 0.26 | 1.95 ± 0.16 | 2.28 ± 0.29 |
| Gl 417 B | 0.55 (14.34) | 1.21 (13.31) | 0.76 (–) | 1.30 | – | 7.03 ± 0.40 | 11.02 ± 0.23 | 4.85 ± 0.23 | 7.64 ± 0.33 |
| ABPic b | 0.67 (10.66) | 1.10 (9.33) | 0.89 (8.72) | 1.20 | 3.46 ± 0.75 | 2.84 ± 0.30 | 4.74 ± 0.35 | 3.00 ± 0.19 | 1.50 ± 0.25 |
| USco CTIO 108B | 0.68 (10.36) | 1.11 (9.69) | 0.83 (10.01) | – | 5.96 ± 0.18 | 1.68 ± 0.17 | 2.82 ± 0.14 | 2.39 ± 0.14 | 1.54 ± 0.13 |
| HR7329B | 0.73 (8.83) | 1.04 (7.15) | 0.93 (7.86) | – | 4.58 ± 1.21 | 2.29 ± 0.47 | 3.59± 0.54 | 1.29 ± 0.24 | 2.42 ± 0.14 |
| CT Cha b | 0.74 (8.52) | 1.05 (7.51) | 0.92 (8.08) | – | – | 1.36 ± 0.22 | 1.38 ± 0.25 | 0.95 ± 0.17 | 0.62 ± 0.25 |
| DH Tau B | 0.71 (9.44) | 1.10 (9.32) | 0.91 (8.29) | – | 3.38 ± 0.76 | 1.33 ± 0.24 | 3.54 ± 0.25 | 2.17 ± 0.13 | 0.85 ± 0.20 |
| GSC8047 B | 0.73 (8.83) | – | – | – | – | 2.01 ± 0.53 | 2.75 ± 0.52 | 3.19 ± 0.39 | 3.14 ± 0.48 |
| TWA 22A | 0.83 (5.76) | 0.98 (4.97) | 1.08 (4.64) | 1.06 | 3.73 ± 0.30 | 0.88 ± 0.15 | 1.88 ± 0.17 | 0.97 ± 0.04 | 0.95 ± 0.07 |
| TWA 22B | 0.83 (5.76) | 1.01 (6.06) | 1.04 (5.50) | 1.07 | 4.37 ± 0.27 | 1.17 ± 0.15 | 2.08 ± 0.16 | 0.81 ± 0.10 | 1.13 ± 0.09 |
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| 2M0345 | 0.69 (10.05) | 1.08 (8.60) | 0.85 (9.58) | 1.17 | 9.67 ± 0.57 | 6.09 ± 0.22 | 8.67 ± 0.17 | 4.59 ± 0.20 | 7.02 ± 0.27 |
Notes. Spectral types associated with the indices are reported in brackets. Values of 5 and 10 correspond to spectral types M5 and L0 respectively.
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