Table 4
Spectral indices for spectral type determination.
| Index | Value | SpT | Index ref. |
|---|---|---|---|
| USco1621 B | |||
| Optical | |||
| TiO-7140 | 2.66 | M6-M8 | W05 |
| TiO-8465 | 1.89 | M7.5 | S06 |
| TiO5 (a) | 0.35 | M8.25 ± 0.50 | K99, CR02 |
| VO-a (a) | 2.51 | L0.0 ± 0.75/M9.0 ± 0.5 | R95, CR02 |
| PC3 | 1.97 | M8.5 ± 0.25 | M99 |
| Infrared (b) | |||
| H2O | 1.13 | M9.25 ± 0.5 | A07 |
| H2OD | 0.97 | L0.75 ± 0.75 | ML03 |
| H2O-1 | 0.69 | L0.25 ± 1 | S04 |
| H2O-2 | 0.89 | M9.25 ± 0.5 | S04 |
| FeH | 0.87 | M9.0 ± 0.5 | S04 |
| USco1556 B | |||
| Optical | |||
| TiO-7140 | 1.72 | M9–L0 | W05 |
| TiO-8465 | 2.51 | M8–M9 | S06 |
| TiO5 (a) | 0.52 | M9.0 ± 0.5 | K99, CR02 |
| VO-a (a) | 2.58 | L1.0 ± 0.75/M8.5 ± 0.5 | R95, CR02 |
| PC3 | 2.27 | M9.5 ± 0.25 | M99 |
| Infrared (b) | |||
| H2O | 1.18 | L0.5 ± 0.5 | A07 |
| H2OD | 1.05 | M8.25 ± 0.75 | ML03 |
| H2O-1 | 0.66 | L1.25 ± 1 | S04 |
| H2O-2 | 0.87 | M9.75 ± 0.5 | S04 |
| FeH | 0.83 | L0.0 ± 0.5 | S04 |
Notes. (a) Calculated using the relations in Cruz & Reid (2002). (b)Results obtained using the Allers & Liu (2013) polynomial fits.
References. A07 – Allers et al. (2007), CR02 – Cruz & Reid (2002), K99 – Kirkpatrick et al. (1999), M99 – Martín et al. (1999), ML03 – McLean et al. (2003), R95 – Reid et al. (1995), S04 – Slesnick et al. (2004), S06 – Slesnick et al. (2006), W05 –Wilking et al. (2005).
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