All names: WD 1636-008, GALEX J163838.2-005416, SDSS J163838.24-005417.50, SDSS J163838.23-005417.5, Gaia EDR3 4382403862256376704, Gaia DR3 4382403862256376704, Gaia DR2 4382403862256376704, SDSS J163838.24-005417.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Stilism | Harris et al. 2003 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 38 38.24 (0.4) | 16 38 38.24 | 16 38 38.24 (0.6) | 16 38 38.24 (0.4) | 16 38 38.24 | 16 38 37.70 | 16 38 38.24 | |||||
| Declination | -00 54 17.69 (0.2) | -00 54 17.52 | -00 54 17.68 (0.4) | -00 54 17.53 (0.2) | -00 54 17.54 | -00 54 11.52 | -00 54 17.50 | |||||
| Spectral type | sdO: | DB | SDO: | DB1.3 | DBA: | |||||||
| Effective temperature | [K] | 15523.0 | 39905.0 (253) | 46069.0 (1137) | ||||||||
| log(g) | [cgs] | 6.96 | 7.03 (0.04) | 7.28 (0.3) | ||||||||
| Mass | [M☉] | 0.225 | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | -3.375 | |||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 0.16 (0.4) | -0.09 (0.5) | 0.16 (0.4) | ||||||||
| Distance | [pc] | 6359.66 (15279) | 6361.32 (15288) | |||||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 2.301747337 (0.6) | 0.517906098 (1) | 2.302 (0.6) | ||||||||
| Proper motion (declination) | [mas/yr] | -9.490405833 (0.4) | -10.51542267 (0.8) | -9.49 (0.4) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 19.33 (0.02) | 19.42 | 19.39 (0.03) | 19.41 (0.03) | 19.42 | 19.39 (0.03) | ||||||
| g magnitude | 19.58 (0.01) | 19.65 | 19.62 (0.02) | 19.65 (0.02) | 19.65 | 19.62 (0.02) | ||||||
| r magnitude | 19.94 (0.02) | 19.98 | 19.97 (0.02) | 19.99 (0.02) | 19.98 | 19.97 (0.02) | ||||||
| i magnitude | 20.23 (0.04) | 20.27 | 20.27 (0.04) | 20.27 (0.04) | 20.27 | 20.27 (0.04) | ||||||
| z magnitude | 20.30 (0.1) | 20.33 | 20.33 (0.1) | 20.33 (0.1) | 20.32 | 20.33 (0.1) | ||||||
| G magnitude | 19.76 (0.04) | 19.82 | 19.76 (0.005) | |||||||||
| BP magnitude | 19.69 (0.04) | 19.67 | ||||||||||
| RP magnitude | 20.02 (0.08) | 20.02 | ||||||||||
| Pan g magnitude | 19.65 (0.006) | |||||||||||
| Pan r magnitude | 19.95 (0.01) | |||||||||||
| Pan i magnitude | 20.23 (0.02) | |||||||||||
| Pan z magnitude | 20.50 (0.03) | |||||||||||
| Pan y magnitude | 19.67 (0.2) | |||||||||||
| E(B-V) | 0.129 | |||||||||||
* 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.