All names: Gaia DR3 6364918198670588928, WD 1834-781, WD 1834-78, WDJ184225.24-780505.16, Gaia DR2 6364918198670588928, WD1834-781, 2MASS J18422528-7805055, TIC 351918143, LTT 7392, Gaia EDR3 6364918198670588928, BPM 11593, LAWD 70, NLTT 46733, L 44-95
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Koester et al. 2009 | Koester et al. 2001 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 42 25.89 (0.02) | 18 42 25.87 (0.04) | 18 42 25.50 | 18 42 25.89 | 18 42 25.24 (0.02) | 18 42 25.87 | 18 42 29.18 | ||||
| Declination | -78 05 10.15 (0.03) | -78 05 09.99 (0.04) | -78 05 06.00 | -78 05 10.15 | -78 05 05.16 (0.03) | -78 05 09.99 | -78 06 11.88 | ||||
| Spectral type | DA | DA | DA | DA2.6 | DA3 | ||||||
| Effective temperature | [K] | 19060.0 (283) | 17723.0 (22) | 17422.0 (47) | 18538.0 (199) | ||||||
| log(g) | [cgs] | 7.79 (0.04) | 7.77 (0.005) | 7.77 (0.01) | 7.92 (0.01) | ||||||
| Mass | [M☉] | 0.51 (0.02) | 0.5 | 0.577 (0.007) | |||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| 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] | 12.08 (0.03) | 11.99 (0.05) | 12.08 | 12.08 (0.03) | 11.99 (0.05) | |||||
| Distance | [pc] | 82.75 (0.2) | 83.38 (0.3) | 95.00 | 82.75 | 82.75 (0.2) | 83.38 (0.3) | ||||
| Composition | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 126.477812 (0.03) | 126.5088194 (0.07) | 126.478 (0.03) | 126.5088194 | ||||||
| Proper motion (declination) | [mas/yr] | -311.8959804 (0.03) | -311.8049838 (0.08) | -311.896 (0.03) | -311.8049838 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 15.17 | ||||||||||
| V magnitude | 15.45 | 15.45 | |||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.67 (0.07) | ||||||||||
| H magnitude | 15.41 (0.1) | ||||||||||
| K magnitude | |||||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 15.40 (0.002) | 15.42 | 15.40 | 15.40 (0.003) | 15.42 | ||||||
| BP magnitude | 15.33 (0.002) | 15.32 | 15.32 | ||||||||
| RP magnitude | 15.56 (0.002) | 15.56 | 15.56 | ||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.005 | ||||||||||
* 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.