All names: SDSS J204054.19-011107.3, 2SLAQ J204054.18-011107.3, Gaia DR3 4226264002702439680, Gaia DR2 4226264002702439680, WD 2038-013, SDSS J204054.18-011107.3, [HHD2009] SDSS J2040-0111, Gaia EDR3 4226264002702439680
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 40 54.19 (0.2) | 20 40 54.18 | 20 40 54.19 (0.3) | 20 40 54.18 | 20 40 54.18 (0.2) | 20 40 54.19 | 20 40 53.93 | 20 40 54.19 | |||
| Declination | -01 11 07.25 (0.2) | -01 11 07.31 | -01 11 07.25 (0.3) | -01 11 07.30 | -01 11 07.32 (0.2) | -01 11 07.32 | -01 11 04.92 | -01 11 07.33 | |||
| Spectral type | DA+M | DA+M | DA+M | DA dM | DA+M | ||||||
| Effective temperature | [K] | 21289.0 (2152) | 7975.0 (124) | 7562.0 (119) | |||||||
| log(g) | [cgs] | 7.82 (0.4) | 8.33 (0.2) | 8.22 (0.2) | |||||||
| Mass | [M☉] | 0.53 (0.2) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.19 (0.3) | 1.39 (0.4) | 1.19 (0.3) | |||||||
| Distance | [pc] | 843.17 (229) | 719.15 (222) | 466.00 (250) | 843.17 (229) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 2.555001576 (0.3) | 3.304995302 (0.7) | 2.555 (0.3) | 4.0 | ||||||
| Proper motion (declination) | [mas/yr] | 4.099552666 (0.3) | 4.138867014 (0.5) | 4.1 (0.3) | 6.7 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 19.83 (0.04) | 19.86 | 19.84 (0.04) | 19.86 (0.04) | 19.86 | 19.86 (0.04) | |||||
| g magnitude | 19.72 (0.02) | 19.75 | 19.71 (0.02) | 19.75 (0.02) | 19.75 | 19.76 (0.02) | |||||
| r magnitude | 19.75 (0.02) | 19.80 | 19.76 (0.02) | 19.80 (0.02) | 19.80 | 19.79 (0.02) | |||||
| i magnitude | 19.19 (0.02) | 19.22 | 19.21 (0.02) | 19.22 (0.02) | 19.22 | 19.20 (0.02) | |||||
| z magnitude | 18.62 (0.03) | 18.67 | 18.62 (0.04) | 18.67 (0.04) | 18.67 | 18.64 (0.03) | |||||
| G magnitude | 19.43 (0.04) | 19.44 | 19.43 (0.004) | ||||||||
| BP magnitude | 19.80 (0.04) | 19.62 | |||||||||
| RP magnitude | 18.78 (0.03) | 18.75 | |||||||||
| Pan g magnitude | 19.74 (0.02) | ||||||||||
| Pan r magnitude | 19.78 (0.01) | ||||||||||
| Pan i magnitude | 19.23 (0.006) | ||||||||||
| Pan z magnitude | 18.74 (0.01) | ||||||||||
| Pan y magnitude | 18.49 (0.03) | ||||||||||
| E(B-V) | 0.048 | ||||||||||
* 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.