All names: WD 0309-210, MCT 0309-2105, Gaia DR2 5102795329494950784, WDJ031158.15-205408.62, 2MASS J03115815-2054086, HE 0309-2105, Gaia DR3 5102795329494950784, EC 03097-2105, Gaia EDR3 5102795329494950784, UCAC4 346-003380, TIC 344335536
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Bergeron et al. 2021 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 03 11 58.20 (0.03) | 03 11 58.20 (0.05) | 03 11 58.20 | 03 11 58.15 (0.03) | 03 11 58.20 | 03 11 57.77 | ||||
| Declination | -20 54 07.75 (0.03) | -20 54 07.77 (0.04) | -20 54 07.75 | -20 54 08.62 (0.03) | -20 54 07.77 | -20 54 03.60 | ||||
| Spectral type | DC | DB | DC | DC | ||||||
| Effective temperature | [K] | 9966.0 (94) | 10661.0 (82) | |||||||
| log(g) | [cgs] | 7.95 (0.02) | 8.12 (0.01) | |||||||
| Mass | [M☉] | 0.549 (0.009) | 0.656 (0.009) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | 0.6139 | ||||||||
| log(H/He) | -4.6 | |||||||||
| 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] | 21.49 (0.03) | 21.50 (0.05) | 21.49 | 21.49 (0.03) | 21.50 (0.05) | ||||
| Distance | [pc] | 46.53 (0.07) | 46.00 | 46.51 (0.1) | 46.53 | 46.53 (0.07) | 46.51 (0.1) | |||
| Composition | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | 42.8994346 (0.04) | 42.9535928 (0.1) | 42.899 (0.04) | 42.9535928 | |||||
| Proper motion (declination) | [mas/yr] | 54.39974105 (0.03) | 54.45254523 (0.1) | 54.4 (0.03) | 54.45254523 | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 15.75 (0.01) | |||||||||
| V magnitude | 15.62 (0.01) | |||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 15.60 (0.06) | |||||||||
| H magnitude | 15.76 (0.1) | |||||||||
| K magnitude | 15.77 (0.2) | |||||||||
| u magnitude | ||||||||||
| g magnitude | 15.60 (0.05) | |||||||||
| r magnitude | 15.70 (0.04) | |||||||||
| i magnitude | 15.74 (0.2) | |||||||||
| z magnitude | ||||||||||
| G magnitude | 15.59 (0.003) | 15.61 | 15.59 | 15.59 (0.003) | 15.61 | |||||
| BP magnitude | 15.60 (0.003) | 15.58 | 15.58 | |||||||
| RP magnitude | 15.54 (0.003) | 15.53 | 15.53 | |||||||
| Pan g magnitude | 15.57 (0.005) | |||||||||
| Pan r magnitude | 15.69 (0.002) | |||||||||
| Pan i magnitude | 15.88 (0.002) | |||||||||
| Pan z magnitude | 16.05 (0.006) | |||||||||
| Pan y magnitude | 16.17 (0.005) | |||||||||
| E(B-V) | 0.000 | |||||||||
* 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.