All names: Gaia EDR3 6862687522250677376, PSO J307.7891-16.9780, LP 815-31, WDJ203109.57-165841.93, GALEX J203109.4-165841, NLTT 49374, CNS5 5069, Gaia DR3 6862687522250677376, 2MASS J20310959-1658420, J2031-1658, TIC 429186365, Gaia DR2 6862687522250677376, NLTT49374
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | Subasavage et al. 2022 | Blouin & Xu 2022 | Blouin et al. 2019 | Gaia DR2 | Subasavage et al. 2017 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 31 09.36 (0.05) | 20 31 09.36 (0.05) | 20 31 09.58 | 20 31 09.36 | 20 31 09.57 (0.05) | 20 31 09.36 | ||||||||
| Declination | -16 58 40.89 (0.03) | -16 58 40.92 (0.04) | -16 58 04.09 | -16 58 40.89 | -16 58 41.92 (0.03) | -16 58 40.92 | ||||||||
| Spectral type | DAZ | DAZ | DAZ | DAZ | DAZ | DA | DAZ | |||||||
| Effective temperature | [K] | 5460.0 (53) | 5611.0 (11) | 5670.0 (88) | 5506.0 (19) | 5500.0 (35) | 5640.0 (90) | 5473.0 (22) | ||||||
| log(g) | [cgs] | 7.90 (0.04) | 7.97 (0.005) | 8.03 (0.04) | 7.93 (0.01) | 7.93 (0.02) | 8.03 (0.04) | 7.91 (0.01) | ||||||
| Mass | [M☉] | 0.525 (0.02) | 0.555 (0.004) | 0.602 (0.03) | 0.541 (0.007) | 0.542 (0.01) | 0.6 (0.03) | 0.533 (0.008) | ||||||
| log(Luminosity) | [L☉] | -3.85 (0.04) | ||||||||||||
| Cooling age | [Gyr] | 3.5100 | 2.6600 | 2.6970 (0.1) | 2.9600 (0.4) | |||||||||
| log(H/He) | ||||||||||||||
| log(C/He) | ||||||||||||||
| log(Ca/He) | ||||||||||||||
| log(Ca/H) | -10.15 | -9.97 (0.07) | ||||||||||||
| 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] | 43.83 (0.06) | 43.83 (0.06) | 43.79 (0.06) | 43.79 (0.06) | 43.83 (0.06) | 43.79 (0.06) | 43.79 (0.06) | 44.22 (0.5) | 43.83 | 43.83 (0.06) | 43.79 (0.06) | ||
| Distance | [pc] | 22.82 (0.03) | 22.82 (0.03) | 22.84 (0.03) | 22.84 (0.04) | 22.82 (0.03) | 22.84 (0.03) | 22.84 (0.03) | 22.61 (0.3) | 22.82 | 22.82 (0.03) | 22.84 (0.03) | ||
| Composition | H | H | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -187.6842711 (0.06) | -187.5943582 (0.1) | -187.684 (0.06) | -187.5943582 | |||||||||
| Proper motion (declination) | [mas/yr] | 64.90014554 (0.05) | 65.00661887 (0.07) | 64.9 (0.04) | 65.00661887 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 16.89 | 16.92 | ||||||||||||
| V magnitude | 16.29 | 16.28 | 16.25 | |||||||||||
| R magnitude | 15.89 | 15.89 | ||||||||||||
| I magnitude | 15.49 | 15.48 | ||||||||||||
| J magnitude | 15.00 (0.003) | 14.98 | 14.98 (0.04) | 14.98 (0.04) | 14.98 (0.04) | |||||||||
| H magnitude | 14.79 (0.08) | 14.79 | 14.79 (0.08) | 14.79 (0.08) | 14.79 (0.08) | |||||||||
| K magnitude | 14.69 (0.01) | 14.79 | 14.79 (0.1) | 14.80 (0.1) | 14.79 (0.1) | |||||||||
| u magnitude | ||||||||||||||
| g magnitude | 16.52 (0.004) | |||||||||||||
| r magnitude | 16.08 (0.002) | |||||||||||||
| i magnitude | 15.90 (0.002) | |||||||||||||
| z magnitude | 15.85 (0.004) | |||||||||||||
| G magnitude | 16.09 (0.006) | 16.10 | 16.09 | 16.09 (0.003) | 16.10 | |||||||||
| BP magnitude | 16.48 (0.006) | 16.47 | 16.47 | |||||||||||
| RP magnitude | 15.58 (0.009) | 15.55 | 15.55 | |||||||||||
| Pan g magnitude | 16.52 (0.004) | 16.52 (0.004) | 16.52 (0.004) | 16.52 (0.004) | ||||||||||
| Pan r magnitude | 16.08 (0.002) | 16.08 (0.002) | 16.08 (0.002) | 16.08 (0.002) | ||||||||||
| Pan i magnitude | 15.90 (0.002) | 15.90 (0.002) | 15.90 (0.002) | 15.90 (0.002) | ||||||||||
| Pan z magnitude | 15.85 (0.003) | 15.85 (0.004) | 15.85 (0.004) | 15.85 (0.004) | ||||||||||
| Pan y magnitude | 15.82 (0.005) | 15.82 (0.005) | 15.82 (0.005) | 15.82 (0.005) | ||||||||||
| 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.