All names: WDJ091847.15+012410.95, SDSS J091847.12+012410.4, GALEX J091847.1+012410, Gaia DR2 3844228070471625216, Gaia EDR3 3844228070471625216, J0918+0124, Gaia DR3 3844228070471625216, SDSS J091847.11+012410.4
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 18 47.08 (0.2) | 09 18 47.08 | 09 18 47.08 | 09 18 47.15 (0.2) | 09 18 47.08 | ||||||
| Declination | 01 24 09.74 (0.2) | 01 24 09.78 | 01 24 09.74 | 01 24 10.95 (0.2) | 01 24 09.78 | ||||||
| Spectral type | DC | DC | DC | DC: | DC | ||||||
| Effective temperature | [K] | 6159.0 (51) | 5956.0 (53) | 5861.0 (48) | 5672.0 (308) | ||||||
| log(g) | [cgs] | 8.03 (0.03) | 7.89 (0.04) | 7.84 (0.04) | 7.93 (0.08) | ||||||
| Mass | [M☉] | 0.591 (0.03) | 0.508 (0.03) | 0.479 (0.03) | 0.528 (0.07) | ||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 2.2100 | |||||||||
| log(H/He) | -3.0 | -3 | |||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 10.15 (0.2) | 10.08 (0.3) | 10.08 (0.3) | 10.15 | 10.15 (0.2) | 10.08 (0.3) | ||||
| Distance | [pc] | 98.50 (2) | 99.21 (3) | 99.22 (3) | 98.50 | 98.50 (2) | 99.22 (3) | ||||
| Composition | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -64.36623619 (0.3) | -64.47912623 (0.5) | -64.366 (0.3) | -64.47912623 | ||||||
| Proper motion (declination) | [mas/yr] | -75.56177697 (0.2) | -75.67092607 (0.4) | -75.562 (0.2) | -75.67092607 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 18.22 (0.05) | ||||||||||
| H magnitude | 18.03 (0.07) | ||||||||||
| K magnitude | 18.29 (0.2) | ||||||||||
| u magnitude | 19.96 (0.05) | 20.00 (0.04) | 20.00 (0.04) | ||||||||
| g magnitude | 19.28 (0.01) | 19.28 (0.01) | |||||||||
| r magnitude | 18.97 (0.01) | 18.97 (0.01) | |||||||||
| i magnitude | 18.86 (0.01) | 18.86 (0.01) | |||||||||
| z magnitude | 18.88 (0.05) | 18.88 (0.05) | |||||||||
| G magnitude | 18.97 (0.04) | 19.00 | 18.97 | 18.97 (0.004) | 19.00 | ||||||
| BP magnitude | 19.23 (0.04) | 19.16 | 19.16 | ||||||||
| RP magnitude | 18.60 (0.03) | 18.57 | 18.57 | ||||||||
| Pan g magnitude | 19.23 (0.009) | 19.23 (0.007) | |||||||||
| Pan r magnitude | 18.95 (0.005) | 18.95 (0.004) | |||||||||
| Pan i magnitude | 18.89 (0.007) | 18.89 (0.006) | |||||||||
| Pan z magnitude | 18.92 (0.009) | 18.92 (0.01) | |||||||||
| Pan y magnitude | 18.89 (0.03) | 18.89 (0.03) | |||||||||
| E(B-V) | 0.004 | ||||||||||
* 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.