All names: WDJ215008.33-043900.36, Gaia DR3 2669936427801840256, WDJ21508.33-043900.36, J2150-0439, GALEX J215008.3-043901, Gaia DR2 2669936427801840256, NLTT 52217, SDSS J215008.49-043902.4, LP 698-51, Gaia EDR3 2669936427801840256
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | Bergeron et al. 2022 | Tremblay et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 50 08.61 (0.1) | 21 50 08.60 | 21 50 08.61 | 21 50 08.33 (0.1) | 21 50 08.60 | |||||||
| Declination | -04 39 03.77 (0.1) | -04 39 03.67 | -04 39 03.77 | -04 39 00.35 (0.1) | -04 39 03.67 | |||||||
| Spectral type | DC | DC | DC | DC | DC | DC | ||||||
| Effective temperature | [K] | 5304.0 (85) | 4564.0 (28) | 4549.0 (26) | 5320.0 (80) | 5637.0 (53) | ||||||
| log(g) | [cgs] | 8.30 (0.05) | 8.07 (0.007) | 8.32 (0.06) | 8.50 (0.02) | |||||||
| Mass | [M☉] | 0.766 (0.04) | 0.61 (0.005) | 0.6 (0.009) | 0.91 (0.02) | |||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 7.1900 | 6.8750 | |||||||||
| log(H/He) | -2.49 | -2.47 | ||||||||||
| 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] | 28.17 (0.1) | 28.17 (0.1) | 28.17 (0.1) | 28.11 (0.3) | 28.17 | 28.17 (0.1) | 28.11 (0.3) | ||||
| Distance | [pc] | 35.50 (0.2) | 35.50 (0.2) | 35.50 (0.2) | 35.58 (0.3) | 35.50 | 35.50 (0.2) | 35.58 (0.3) | ||||
| Composition | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 252.4486243 (0.2) | 252.8090957 (0.3) | 252.449 (0.2) | 252.8090957 | |||||||
| Proper motion (declination) | [mas/yr] | -213.8039397 (0.1) | -213.2749909 (0.3) | -213.804 (0.1) | -213.2749909 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 17.68 (0.02) | |||||||||||
| H magnitude | 18.22 (0.09) | |||||||||||
| K magnitude | 18.75 (0.3) | |||||||||||
| u magnitude | 19.58 (0.04) | 19.58 (0.04) | 19.58 (0.04) | |||||||||
| g magnitude | 18.34 (0.007) | 18.34 (0.007) | ||||||||||
| r magnitude | 17.72 (0.006) | 17.72 (0.006) | ||||||||||
| i magnitude | 17.52 (0.007) | 17.52 (0.007) | ||||||||||
| z magnitude | 17.62 (0.02) | 17.62 (0.02) | ||||||||||
| G magnitude | 17.77 (0.01) | 17.80 | 17.77 | 17.77 (0.003) | 17.80 | |||||||
| BP magnitude | 18.19 (0.01) | 18.19 | 18.19 | |||||||||
| RP magnitude | 17.25 (0.01) | 17.25 | 17.25 | |||||||||
| Pan g magnitude | 18.25 (0.006) | 18.25 (0.006) | ||||||||||
| Pan r magnitude | 17.72 (0.005) | 17.72 (0.005) | ||||||||||
| Pan i magnitude | 17.53 (0.004) | 17.53 (0.004) | ||||||||||
| Pan z magnitude | 17.59 (0.008) | 17.59 (0.008) | ||||||||||
| Pan y magnitude | 17.76 (0.06) | 17.76 (0.06) | ||||||||||
| E(B-V) | 0.001 | |||||||||||
* 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.