All names: Gaia DR3 3842611032464461056, SDSS J091755.64+003351.80, SDSS J091755.64+003351.8, GALEX J091755.6+003351, WD 0915+007, SDSS J091755.61+003351.6, SDSS J091755.63+003351.7, Gaia DR2 3842611032464461056, Gaia EDR3 3842611032464461056, SDSS J091755.63+003351.6
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Stilism | Koester & Kepler 2015 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 17 55.59 (0.3) | 09 17 55.63 | 09 17 55.63 (0.3) | 09 17 55.63 | 09 17 55.25 | 09 17 55.64 | ||||||
| Declination | 00 33 51.71 (0.3) | 00 33 51.70 | 00 33 51.75 (0.3) | 00 33 51.69 | 00 33 45.72 | 00 33 51.76 | ||||||
| Spectral type | DB | DB | DB2.8 | DB | DB | |||||||
| Effective temperature | [K] | 17620.0 | 17732.0 (196) | 18294.0 (226) | 18254.0 (311) | |||||||
| log(g) | [cgs] | 8.02 | 7.92 (0.1) | 8.22 (0.09) | 8.17 (0.1) | |||||||
| Mass | [M☉] | 0.606 | 0.691 (0.06) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | <-5.774 | <-4.48 | ||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | <-5.38 | |||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 2.45 (0.3) | 2.45 (0.3) | |||||||||
| Distance | [pc] | 407.97 (50) | 404.00 | 407.96 (50) | ||||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -40.38985294 (0.4) | -40.39 (0.4) | -34.5 | ||||||||
| Proper motion (declination) | [mas/yr] | -1.971617398 (0.3) | -1.972 (0.3) | -10.2 | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 19.70 (0.2) | |||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 18.61 (0.02) | 18.61 (0.02) | 18.65 (0.02) | 18.63 | 18.63 (0.02) | |||||||
| g magnitude | 18.72 (0.008) | 18.72 (0.008) | 18.75 (0.02) | 18.75 | 18.74 (0.02) | |||||||
| r magnitude | 19.09 (0.01) | 19.12 (0.01) | 19.12 (0.01) | 19.12 | 19.12 (0.02) | |||||||
| i magnitude | 19.27 (0.02) | 19.27 (0.02) | 19.28 (0.02) | 19.28 | 19.29 (0.02) | |||||||
| z magnitude | 19.49 (0.07) | 19.49 (0.07) | 19.48 (0.07) | 19.50 | 19.49 (0.07) | |||||||
| G magnitude | 18.91 (0.03) | 18.91 (0.004) | ||||||||||
| BP magnitude | 18.91 (0.03) | |||||||||||
| RP magnitude | 18.95 (0.04) | |||||||||||
| Pan g magnitude | 18.79 (0.007) | |||||||||||
| Pan r magnitude | 19.09 (0.008) | |||||||||||
| Pan i magnitude | 19.36 (0.02) | |||||||||||
| Pan z magnitude | 19.62 (0.02) | |||||||||||
| Pan y magnitude | 19.85 (0.09) | |||||||||||
| E(B-V) | 0.033 | |||||||||||
* 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.