Table 2
Characteristics of L and T dwarfs.
| Spectral type spt | MYmod (mag) | n⊙ (10−3 pc−3 spt−1) | dYmod=22.5 (pc) |
|||
|---|---|---|---|---|---|---|
| W1 | W2 | W3 | W4 | |||
| L0 | 13.21 | 0.637 | 695 | 702 | 687 | 666 |
| L1 | 13.62 | 0.861 | 579 | 584 | 573 | 558 |
| L2 | 14.09 | 1.000 | 470 | 473 | 466 | 456 |
| L3 | 14.54 | 0.834 | 383 | 385 | 380 | 374 |
| L4 | 15.00 | 0.819 | 311 | 312 | 309 | 305 |
| L5 | 15.40 | 0.869 | 259 | 260 | 258 | 255 |
| L6 | 15.76 | 0.785 | 220 | 221 | 220 | 217 |
| L7 | 16.09 | 0.644 | 190 | 191 | 190 | 188 |
| L8 | 16.21 | 0.462 | 180 | 180 | 179 | 178 |
| L9 | 16.36 | 0.308 | 167 | 168 | 167 | 166 |
| T0 | 16.39 | 0.22 | 165 | 166 | 165 | 163 |
| T1 | 16.39 | 0.241 | 166 | 166 | 165 | 164 |
| T2 | 16.36 | 0.406 | 167 | 168 | 167 | 165 |
| T3 | 16.23 | 0.788 | 178 | 178 | 177 | 176 |
| T4 | 16.32 | 1.42 | 171 | 171 | 170 | 169 |
| T5 | 16.35 | 2.38 | 168 | 169 | 168 | 166 |
| T6 | 16.60 | 3.45 | 150 | 151 | 150 | 149 |
| T7 | 17.11 | 4.82 | 119 | 119 | 119 | 118 |
| T8 | 17.96 | 6.19 | 81 | 81 | 81 | 81 |
| T9 | 19.25 | 7.56 | 45 | 45 | 45 | 44 |
Notes. d is the maximum heliocentric distance for which a brown dwarf of a given spectral type and with an apparent magnitude Ymod = 22.5 can be detected. The absolute magnitudes MYmod were computed by combining the absolute magnitude in the 2MASS J filter MJ2MASS derived by Dupuy & Liu (2012) for each spectral type, with the observed colours Ymod − J2MASS measured on the 813 brown dwarf spectra used in this study. We also reference the local spatial density n⊙.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.