Table 1
Astrometry, photometry and physical parameters for the six new BDs candidates.
| Parameter | WISE J0802+2527 | WISE J0820+2632 | WISE J0821+1443 | WISE J0830+4837 | WISE J0838+1511 | WISE J0920+4538 | |
|
|
|||||||
| RA(J2000) | 08 02 02.86 | 08 20 07.35 | 08 21 31.63 | 08 30 41.67 | 08 38 11.45 | 09 20 55.41 | |
| Dec(J2000) | +25 27 18.5 | +26 32 28.5 | +14 43 19.4 | +48 37 15.0 | +15 11 15.1 | +45 38 56.4 | |
| μαcosδ (″/year) | –0.011 ± 0.026 | 0.087 ± 0.042 | –0.115 ± 0.035 | –0.125 ± 0.026 | –0.121 ± 0.031 | –0.075 ± 0.010 | |
| μδ (″/year) | –0.125 ± 0.055 | –0.208 ± 0.062 | –0.297 ± 0.054 | –0.058 ± 0.050 | –0.032 ± 0.051 | –0.833 ± 0.045 | |
| z’ | 19.238 ± 0.069 | 19.514 ± 0.067 | 19.732 ± 0.118 | 19.905 ± 0.153 | 19.907 ± 0.142 | 21.002 ± 0.658 | |
| Y (UKIDSS) | 17.914 ± 0.012 | 18.145 ± 0.029 | |||||
| J (2MASS) | 16.713 ± 0.157 | 16.988 ± 0.222 | 16.825 ± 0.155 | 17.275 ± 0.199 | 16.645 ± 0.159 | 15.223 ± 0.052 | |
| J (UKIDSS) | 16.626 ± 0.010 | 17.036 ± 0.015 | |||||
| H (2MASS) | 15.797 ± 0.154 | 15.995 ± 0.221 | 16.515 ± 0.240 | 16.279 ± 0.176 | 16.207 ± 0.172 | 14.164 ± 0.054 | |
| H (UKIDSS) | 15.937 ± 0.019 | 16.487 ± 0.038 | |||||
| Ks (2MASS) | 15.397 ± 0.151 | 15.881 ± 0.251 | 15.596 ± 0.165 | 13.728 ± 0.050 | |||
| Ks (UKIDSS) | 15.248 ± 0.016 | 15.883 ± 0.028 | |||||
| W1 | 14.758 ± 0.037 | 15.578 ± 0.057 | 16.438 ± 0.114 | 14.620 ± 0.034 | 15.712 ± 0.068 | 13.059 ± 0.025 | |
| W2 | 14.256 ± 0.060 | 15.009 ± 0.099 | 14.283 ± 0.064 | 14.000 ± 0.047 | 14.568 ± 0.087 | 12.391 ± 0.026 | |
| W3 | 11.965 ± – | 12.658 ± – | 12.572 ± – | 12.828 ± 0.539 | 12.285 ± – | 11.063 ± 0.115 | |
| W1−W2 | 0.502 | 0.569 | 2.155 | 0.62 | 1.144 | 0.668 | |
| W2−W3 | 2.291 | 2.351 | 1.711 | 1.172 | 2.283 | 1.328 | |
| Teff (VOSA) (K) | 1800 | 2000 | 700 | 1700 | 900 | 1700 | |
| SpT (Teff) | L3-L4 | L2-L3 | T8 | L4-L5 | T6-T7 | L4-L5 | |
| M J | 13.08 | 12.48 | 13.31 | 13.31 | |||
| M W2 | 13.47 | 13.07 | |||||
| d (pc) | 53 | 80 | 15 | 62 | 20 | 24 | |
Notes. See Sect. 3 for a detailed description on how effective temperatures, spectral types, absolute magnitudes and distances were obtained. J and W2 absolute magnitudes were only computed for L and T dwarfs respectively. Also, the uncertainty in W3 is not provided for four of the candidates. According to the WISE source catalogue user’s guide, this happens if the W3 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.
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