All names: J2038+0037, WD 2036+004, SDSS J203853.55+003731.4, SDSS J203853.55+003731.3, Gaia DR2 4231193525645520768, Gaia EDR3 4231193525645520768, WDJ203853.55+003731.29, 2SLAQ J203853.55+003731.3, Gaia DR3 4231193525645520768, GALEX J203853.5+003731
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Tremblay et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 38 53.56 (0.1) | 20 38 53.55 | 20 38 53.56 (0.2) | 20 38 53.56 | 20 38 53.55 (0.1) | 20 38 53.56 | 20 38 53.55 | 20 38 53.30 | 20 38 53.55 | ||||||||
| Declination | 00 37 31.37 (0.1) | 00 37 31.40 | 00 37 31.37 (0.2) | 00 37 31.37 | 00 37 31.30 (0.1) | 00 37 31.37 | 00 37 31.39 | 00 37 30.36 | 00 37 31.35 | ||||||||
| Spectral type | DA | DA | DA | DA | DA | DA_auto | DA | DA | DA | ||||||||
| Effective temperature | [K] | 7231.0 (68) | 7041.0 | 6815.0 | 7030.0 (110) | 7141.0 (136) | 7641.0 (57) | 6977.0 (47) | |||||||||
| log(g) | [cgs] | 8.12 (0.03) | 8.05 | 7.95 | 8.14 (0.2) | 8.10 (0.04) | 8.91 (0.1) | 7.84 (0.1) | |||||||||
| Mass | [M☉] | 0.665 (0.03) | 0.623 | 0.545 | 0.68 (0.1) | 0.654 (0.04) | 0.509 (0.06) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||||
| Cooling age | [Gyr] | 1.7200 | 1.6080 | 1.5490 | 1.9498 | ||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | |||||||||||||||||
| log(Ca/He) | |||||||||||||||||
| log(Ca/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(Sc/H) | |||||||||||||||||
| log(Ti/H) | |||||||||||||||||
| log(Cr/H) | |||||||||||||||||
| log(Mn/H) | |||||||||||||||||
| log(Fe/H) | |||||||||||||||||
| log(Ni/H) | |||||||||||||||||
| Parallax | [mas] | 10.18 (0.2) | 10.06 (0.3) | 10.06 (0.3) | 10.18 | 10.18 (0.2) | 10.06 (0.3) | ||||||||||
| Distance | [pc] | 98.19 (2) | 99.40 (3) | 99.40 (3) | 98.19 | 98.19 (2) | 99.40 (3) | ||||||||||
| Composition | H | H | |||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 7.402189821 (0.2) | 7.227495287 (0.4) | 7.402 (0.2) | 7.227 | 5.3 | |||||||||||
| Proper motion (declination) | [mas/yr] | 4.49947348 (0.2) | 4.683404861 (0.3) | 4.499 (0.2) | 4.683 | 5.8 | |||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | |||||||||||||||||
| V magnitude | |||||||||||||||||
| R magnitude | |||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 17.92 (0.05) | ||||||||||||||||
| H magnitude | 17.69 (0.1) | 17.70 (0.1) | |||||||||||||||
| K magnitude | 17.69 (0.1) | 17.70 (0.1) | |||||||||||||||
| u magnitude | 19.20 (0.02) | 19.15 (0.02) | 19.20 (0.03) | 19.23 (0.03) | 19.18 (0.03) | 19.18 | 19.19 (0.03) | ||||||||||
| g magnitude | 18.67 (0.009) | 18.67 (0.009) | 18.64 (0.009) | 18.68 (0.01) | 18.68 | 18.69 (0.01) | |||||||||||
| r magnitude | 18.49 (0.009) | 18.49 (0.009) | 18.48 (0.009) | 18.48 (0.01) | 18.48 | 18.48 (0.01) | |||||||||||
| i magnitude | 18.46 (0.01) | 18.45 (0.01) | 18.41 (0.01) | 18.45 (0.01) | 18.44 | 18.45 (0.01) | |||||||||||
| z magnitude | 18.44 (0.03) | 18.44 (0.03) | 18.40 (0.04) | 18.46 (0.03) | 18.45 | 18.45 (0.03) | |||||||||||
| G magnitude | 18.46 (0.02) | 18.49 | 18.46 | 18.46 (0.003) | 18.49 | ||||||||||||
| BP magnitude | 18.65 (0.02) | 18.66 | 18.66 | ||||||||||||||
| RP magnitude | 18.16 (0.02) | 18.13 | 18.13 | ||||||||||||||
| Pan g magnitude | 18.65 (0.007) | 18.65 (0.009) | |||||||||||||||
| Pan r magnitude | 18.50 (0.004) | 18.50 (0.004) | |||||||||||||||
| Pan i magnitude | 18.46 (0.005) | 18.46 (0.005) | |||||||||||||||
| Pan z magnitude | 18.52 (0.01) | 18.52 (0.01) | |||||||||||||||
| Pan y magnitude | 18.53 (0.04) | 18.53 (0.05) | |||||||||||||||
| E(B-V) | 0.012 | ||||||||||||||||
* 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.