All names: SDSS J142558.43+402257.8, Gaia EDR3 1491118331986338048, SDSSJ142558.43+402257.8, SDSS J142558.43+402257.86, CBS 184, Gaia DR3 1491118331986338048, Gaia DR2 1491118331986338048, USNO-B1.0 1303-00241313, WDJ142558.43+402257.97, SDSS J142558.42+402257.9, GALEX J142558.4+402257
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Kilic et al. 2026a | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 14 25 58.42 (0.08) | 14 25 58.43 | 14 25 58.43 | 14 25 58.42 (0.1) | 14 25 58.43 (0.08) | |||||
| Declination | 40 22 57.76 (0.08) | 40 22 57.96 | 40 22 57.80 | 40 22 57.76 (0.1) | 40 22 57.98 (0.08) | |||||
| Spectral type | sd | He-sdOB | He-sdB | sdBHe | ||||||
| Effective temperature | [K] | 37830.0 | 40529.0 (1632) | 44174.0 (65) | ||||||
| log(g) | [cgs] | 5.70 | 6.03 (0.2) | 6.78 (0.005) | ||||||
| Mass | [M☉] | 0.189 | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | -0.0 | |||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| log(Li/H) | ||||||||||
| log(Be/H) | ||||||||||
| log(B/H) | ||||||||||
| log(C/H) | ||||||||||
| log(N/H) | ||||||||||
| log(O/H) | ||||||||||
| log(Na/H) | ||||||||||
| log(Mg/H) | ||||||||||
| log(Al/H) | ||||||||||
| log(Si/H) | ||||||||||
| log(P/H) | ||||||||||
| log(S/H) | ||||||||||
| log(Cl/H) | ||||||||||
| log(K/H) | ||||||||||
| log(Sc/H) | ||||||||||
| log(Ti/H) | ||||||||||
| log(V/H) | ||||||||||
| log(Cr/H) | ||||||||||
| log(Mn/H) | ||||||||||
| log(Fe/H) | ||||||||||
| log(Co/H) | ||||||||||
| log(Ni/H) | ||||||||||
| log(Cu/H) | ||||||||||
| log(Sr/H) | ||||||||||
| Parallax | [mas] | 0.25 (0.1) | 0.36 (0.2) | 0.36 (0.2) | 0.25 (0.1) | |||||
| Distance | [pc] | 4071.84 (1910) | 2787.07 (1237) | 2786.76 (1237) | 4071.66 (1910) | |||||
| Composition | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | -2.988512123 (0.09) | -2.673 (0.2) | -2.673346418 (0.2) | -2.989 (0.09) | |||||
| Proper motion (declination) | [mas/yr] | -13.6230084 (0.1) | -13.413 (0.2) | -13.41304329 (0.2) | -13.623 (0.1) | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 17.90 | |||||||||
| V magnitude | ||||||||||
| R magnitude | 18.20 | |||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.54 (0.01) | 17.54 (0.01) | 17.54 (0.01) | 17.54 (0.01) | ||||||
| g magnitude | 17.91 (0.006) | 17.91 (0.006) | 17.91 (0.01) | 17.91 (0.006) | ||||||
| r magnitude | 18.37 (0.008) | 18.37 (0.008) | 18.37 (0.01) | 18.37 (0.008) | ||||||
| i magnitude | 18.69 (0.01) | 18.69 (0.01) | 18.69 (0.01) | 18.69 (0.01) | ||||||
| z magnitude | 18.99 (0.05) | 18.99 (0.05) | 18.99 (0.05) | 18.99 (0.05) | ||||||
| G magnitude | 18.16 (0.01) | 18.20 (0.002) | 18.20 | 18.16 (0.003) | ||||||
| BP magnitude | 18.03 (0.01) | 17.93 (0.02) | 17.93 | |||||||
| RP magnitude | 18.40 (0.02) | 18.38 (0.02) | 18.38 | |||||||
| Pan g magnitude | 17.96 (0.02) | 17.96 (0.02) | ||||||||
| Pan r magnitude | 18.40 (0.004) | 18.40 (0.004) | ||||||||
| Pan i magnitude | 18.71 (0.007) | 18.71 (0.007) | ||||||||
| Pan z magnitude | 18.95 (0.01) | 18.95 (0.01) | ||||||||
| Pan y magnitude | 19.04 (0.03) | 19.04 (0.03) | ||||||||
| E(B-V) | 0.021 | |||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.