All names: SDSS J150813.24+394504.9, WD 1506+399, GALEX J150813.2+394504, Gaia DR3 1391901769949322624, Gaia DR2 1391901769949322624, Gaia EDR3 1391901769949322624, SDSS J150813.20+394504.9, SDSS J150813.25+394504.9, CBS 229
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Hardy et al. 2023a | Gaia DR2 | Stilism | Ferrario et al. 2015 | Kulebi et al. 2009 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 08 13.22 (0.1) | 15 08 13.27 | 15 08 13.22 (0.2) | 15 08 13.20 | 15 08 13.26 (0.1) | 15 08 13.25 | 15 08 13.13 | 15 08 13.25 | |||||
| Declination | 39 45 05.24 (0.2) | 39 45 05.11 | 39 45 05.23 (0.3) | 39 45 04.90 | 39 45 04.79 (0.2) | 39 45 04.91 | 39 44 58.20 | 39 45 04.91 | |||||
| Spectral type | DAH | DA | DAH | DAP | DAH | DA | DAH | DAH | |||||
| Effective temperature | [K] | 18708.0 (388) | 18000.0 (2000) | 28410.0 (176) | 29032.0 (167) | ||||||||
| log(g) | [cgs] | 7.71 (0.6) | 8.00 (0) | 9.00 (0.002) | 9.52 (0.04) | ||||||||
| Mass | [M☉] | 0.4727846185172149 (0.05) | 0.81 (0.09) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | ||||||||||||
| 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] | 5.68 (0.2) | 5.17 (0.3) | 5.68 (0.2) | |||||||||
| Distance | [pc] | 176.04 (6) | 193.29 (11) | 176.04 (6) | |||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -26.74504454 (0.2) | -27.29696808 (0.5) | -26.745 (0.2) | -28.7 | ||||||||
| Proper motion (declination) | [mas/yr] | 28.55036619 (0.2) | 30.33223782 (0.6) | 28.55 (0.2) | 18.3 | ||||||||
| Variability | |||||||||||||
| Magnetic | yes | yes | yes | yes | |||||||||
| Bd | [MG] | 20.81200624541226 | 18.9 | 13.23 (3) | |||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 16.91 (0.007) | 17.26 (0.008) | 17.35 (0.02) | 17.34 | 17.32 (0.02) | ||||||||
| g magnitude | 16.82 (0.004) | 17.91 (0.006) | 17.90 (0.08) | 17.89 | 17.89 (0.08) | ||||||||
| r magnitude | 17.14 (0.005) | 17.78 (0.007) | 17.75 (0.04) | 17.74 | 17.74 (0.04) | ||||||||
| i magnitude | 17.38 (0.006) | 18.01 (0.008) | 18.03 (0.04) | 18.02 | 18.02 (0.04) | ||||||||
| z magnitude | 17.70 (0.02) | 18.52 (0.02) | 18.51 (0.05) | 18.50 | 18.49 (0.05) | ||||||||
| G magnitude | 17.63 (0.02) | 17.62 | 17.63 (0.003) | ||||||||||
| BP magnitude | 17.06 (0.02) | 17.00 | |||||||||||
| RP magnitude | 17.25 (0.02) | 17.25 | |||||||||||
| Pan g magnitude | |||||||||||||
| Pan r magnitude | |||||||||||||
| Pan i magnitude | |||||||||||||
| Pan z magnitude | |||||||||||||
| Pan y magnitude | |||||||||||||
| E(B-V) | 0.020 | ||||||||||||
* 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.