All names: 2MASS J19315695+0117439, [VKN2010] GALEX J193156.8+011745, TIC 224187656, WD 1929+012, Gaia DR2 4287654959563143168, WDJ193156.93+011744.11, WD 1929+011, Gaia EDR3 4287654959563143168, GALEX J193156.8+011745, GALEX1931, Gaia DR3 4287654959563143168
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | MWDD H | Gaia DR2 | Stilism | Koester et al. 2014 | Gaensicke et al. 2012 | Zuckerman et al. 2011 | Melis et al. 2011 | Vennes et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 19 31 56.86 (0.03) | 19 31 56.86 (0.04) | 19 31 56.86 | 19 31 56.93 (0.03) | 19 31 56.86 | 19 31 56.45 | |||||||||
| Declination | 01 17 43.87 (0.03) | 01 17 43.88 (0.04) | 01 17 43.87 | 01 17 44.11 (0.03) | 01 17 43.88 | 01 17 44.16 | |||||||||
| Spectral type | DAZ | DAZ | DAZ | DAZ | DAZ | DA | DAZ | DAZ2.4 | |||||||
| Effective temperature | [K] | 20409.0 | 21457.0 (291) | 21200.0 (50) | 23470.0 | 23470.0 (300) | 20890.0 | 23240.0 (282) | |||||||
| log(g) | [cgs] | 7.95 | 7.90 (0.09) | 7.91 (0.02) | 7.99 | 7.99 (0.05) | 7.90 | 8.09 (0.01) | |||||||
| Mass | [M☉] | 0.596 | 0.573 (0.05) | 0.63 | 0.679 (0.009) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 0.0550 | |||||||||||||
| log(H/He) | |||||||||||||||
| log(C/He) | |||||||||||||||
| log(Ca/He) | |||||||||||||||
| log(Ca/H) | -5.83 | -5.83 (0.1) | -6.11 (0.05) | ||||||||||||
| log(C/H) | -6.8 (0.3) | -6.8 (0.3) | <-4.85 | <-4.15 | |||||||||||
| log(N/H) | |||||||||||||||
| log(O/H) | -4.1 (0.3) | -3.68 (0.1) | -3.62 (0.05) | ||||||||||||
| log(Na/H) | |||||||||||||||
| log(Mg/H) | -4.1 (0.1) | -4.42 (0.07) | |||||||||||||
| log(Al/H) | -6.2 (0.2) | <-5.85 | |||||||||||||
| log(Si/H) | -4.75 (0.1) | -4.75 (0.2) | -4.35 (0.1) | -4.24 (0.08) | |||||||||||
| log(P/H) | -7 (0.3) | ||||||||||||||
| log(S/H) | -6.6 (0.2) | ||||||||||||||
| log(Sc/H) | |||||||||||||||
| log(Ti/H) | <-7.00 | ||||||||||||||
| log(Cr/H) | -6.1 (0.3) | -5.92 (0.1) | |||||||||||||
| log(Mn/H) | -6.26 (0.1) | ||||||||||||||
| log(Fe/H) | -4.5 (0.3) | -4.1 (0.1) | -4.43 (0.1) | ||||||||||||
| log(Ni/H) | -6.7 (0.3) | <-5.60 | |||||||||||||
| Parallax | [mas] | 18.78 (0.04) | 18.81 (0.05) | 18.78 | 18.78 (0.04) | 18.81 (0.05) | |||||||||
| Distance | [pc] | 53.25 (0.1) | 53.15 (0.1) | 56.00 | 53.25 | 53.25 (0.1) | 53.15 (0.1) | ||||||||
| Composition | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -69.18101478 (0.04) | -69.11881695 (0.09) | -69.181 (0.04) | -69.11881695 | ||||||||||
| Proper motion (declination) | [mas/yr] | -14.6378832 (0.03) | -14.88746633 (0.07) | -14.638 (0.03) | -14.88746633 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | yes | ||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 14.18 (0.02) | ||||||||||||||
| V magnitude | 14.20 (0.05) | 14.20 (0.02) | 14.20 (0.02) | ||||||||||||
| R magnitude | 14.31 (0.03) | ||||||||||||||
| I magnitude | 14.37 (0.04) | ||||||||||||||
| J magnitude | 14.80 (0.05) | 14.66 (0.05) | |||||||||||||
| H magnitude | 14.80 (0.05) | 14.54 (0.09) | |||||||||||||
| K magnitude | 14.62 (0.05) | 14.45 (0.1) | |||||||||||||
| u magnitude | |||||||||||||||
| g magnitude | |||||||||||||||
| r magnitude | |||||||||||||||
| i magnitude | |||||||||||||||
| z magnitude | |||||||||||||||
| G magnitude | 14.28 (0.001) | 14.30 | 14.28 | 14.28 (0.003) | 14.30 | ||||||||||
| BP magnitude | 14.18 (0.001) | 14.14 | 14.14 | ||||||||||||
| RP magnitude | 14.48 (0.001) | 14.47 | 14.47 | ||||||||||||
| Pan g magnitude | 14.13 (0.002) | ||||||||||||||
| Pan r magnitude | 14.50 (0.003) | ||||||||||||||
| Pan i magnitude | 14.82 (0.003) | ||||||||||||||
| Pan z magnitude | 15.08 (0.004) | ||||||||||||||
| Pan y magnitude | 15.24 (0.008) | ||||||||||||||
| E(B-V) | 0.002 | ||||||||||||||
* 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.