Table 4
Hα, Li I 6708 Å, and Na I (8170–8200 Å) EWs, spectral indices and spectral types estimated from the R3000 spectra for 11 young BD candidates and VLM stars.
| D* name | UT observing date | EW Hα | EW Li | EW Na I | VOa | TiO5 | PC3 | SpTa | Ref. |
|---|---|---|---|---|---|---|---|---|---|
| (Å) | (Å) | (Å) | |||||||
| 0322–3547 | 2023-09-06 | –16±1 | 0.6±0.3 | 4.7±0.3 | 2.07±0.18 | 0.22±0.03 | 1.34±0.10 | M5.5 | |
| 0338–3334 | 2023-08-29 | –16±1 | 0.7±0.3 | 4.8±0.2 | 2.11±0.18 | 0.26±0.04 | 1.38±0.07 | M5.5 | |
| 0338–2646 | 2023-09-06 | –8±1 | 1.1±0.3 | 5.3±0.3 | 2.07±0.23 | 0.24±0.03 | 1.27±0.09 | M5.5 | |
| 0500–3330 | 2023-09-29 | –60±5 | 0.3±0.4 | 4.7±0.3 | 2.18±0.28 | 0.23±0.06 | 1.43±0.12 | M6.0 | |
| 0516–0224 | 2023-10-07 | –60±5 | 0.6±0.3 | 4.0±1.1 | 2.07±0.21 | 0.41±0.08 | 1.32±0.12 | M5.0 | |
| 0521–0802 | 2023-10-03 | –15±1 | 2.9±0.7 | 2.8±1.4 | 2.01±0.43 | 0.24±0.11b | 1.30±0.34 | M5.0 | |
| 0524–0437 | 2023-10-11 | –33±4 | 0.5±0.3 | 3.4±0.4 | 2.01±0.14 | 0.36±0.02 | 1.17±0.05 | M4.5 | |
| 0534–1048 | 2023-10-11 | –246±10 | 0.2±0.3 | 2.4±1.2 | 2.14±0.20 | 0.31±0.03 | 1.41±0.10 | M5.5 | |
| 0844–7833 | 2023-10-12 | –37±3 | 0.6±0.3 | 3.6±1.0 | 2.11±0.19 | 0.27±0.02 | 1.39±0.10 | M5.5 1 | |
| 1853–3605 | 2023-08-04 | –10±1 | 0.7±0.3 | 3.5±1.2 | 2.05±0.16 | 0.25±0.02 | 1.30±0.08 | M5.5 | |
| 1856–3655 | 2023-08-24 | –23±2 | 0.7±0.3 | 3.7±0.5 | 2.10±0.21 | 0.26±0.03 | 1.35±0.09 | M5.5 |
Notes.(a) An uncertainty of 0.5 subtypes of the estimated spectral types.(b) An unreliable value that was not used to estimate spectral type. References for lithium detection: (1) Song et al. (2004).
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