All names: USNO-B1.0 1076-00385309, J1819+1739, PM J18199+1739, Gaia DR2 4523585076572785408, LSPM J1819+1739, Gaia EDR3 4523585076572785408, 18199+1739, WDJ181959.24+173919.13, PSO J274.9977+17.6556, 2MASS J18195921+1739190, Gaia DR3 4523585076572785408, TIC 157555421
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 19 59.48 (0.06) | 18 19 59.47 (0.08) | 18 19 59.47 (0.08) | 18 19 59.48 | 18 19 59.24 (0.06) | 18 19 59.47 | |||||||
| Declination | 17 39 20.49 (0.07) | 17 39 20.45 (0.1) | 17 39 20.45 (0.1) | 17 39 20.49 | 17 39 19.13 (0.07) | 17 39 20.45 | |||||||
| Spectral type | DC | DC | DC | DC | DC | DC | DC | ||||||
| Effective temperature | [K] | 4835.0 (59) | 4891.0 (20) | 4795.0 (48) | 4820.0 (30) | 4820.0 (677) | 4930.0 (32) | ||||||
| log(g) | [cgs] | 7.97 (0.05) | 8.03 (0.01) | 7.96 (0.04) | 7.98 (0.02) | 8.00 (0) | 8.04 (0.02) | ||||||
| Mass | [M☉] | 0.563 (0.03) | 0.598 (0.009) | 0.566 (0.01) | 0.58 (0.1) | 0.606 (0.01) | |||||||
| log(Luminosity) | [L☉] | -4.11 | |||||||||||
| Cooling age | [Gyr] | 6.9600 | 6.2480 (0.3) | ||||||||||
| 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] | 29.24 (0.09) | 29.24 (0.09) | 29.31 (0.1) | 29.31 (0.1) | 29.31 (0.1) | 29.31 (0.1) | 29.24 | 29.24 (0.09) | 29.31 (0.1) | |||
| Distance | [pc] | 34.20 (0.1) | 34.20 (0.1) | 34.12 (0.1) | 34.11 (0.1) | 34.11 (0.1) | 34.11 (0.1) | 35.10 (8) | 34.20 | 34.20 (0.1) | 34.11 (0.1) | ||
| Composition | H | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 212.5036386 (0.07) | 212.125824 (0.2) | 212.504 (0.07) | 212.125824 | ||||||||
| Proper motion (declination) | [mas/yr] | 84.93884729 (0.08) | 84.82572401 (0.2) | 84.939 (0.08) | 84.82572401 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 18.40 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 17.50 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.36 (0.01) | 16.39 (0.1) | 16.39 | 16.39 (0.1) | |||||||||
| H magnitude | 16.02 (0.03) | 16.02 | |||||||||||
| K magnitude | 15.96 (0.3) | 15.96 (0.3) | 15.96 | 15.96 (0.3) | |||||||||
| u magnitude | |||||||||||||
| g magnitude | 18.31 (0.008) | ||||||||||||
| r magnitude | 17.63 (0.003) | ||||||||||||
| i magnitude | 17.36 (0.004) | ||||||||||||
| z magnitude | 17.27 (0.006) | ||||||||||||
| G magnitude | 17.67 (0.01) | 17.68 | 17.68 | 17.67 | 17.67 (0.003) | 17.68 | |||||||
| BP magnitude | 18.19 (0.01) | 18.22 | 18.22 | ||||||||||
| RP magnitude | 17.01 (0.007) | 17.02 | 17.02 | ||||||||||
| Pan g magnitude | 18.31 (0.009) | 18.31 (0.008) | 18.31 (0.008) | ||||||||||
| Pan r magnitude | 17.63 (0.003) | 17.63 (0.003) | 17.63 (0.003) | ||||||||||
| Pan i magnitude | 17.36 (0.003) | 17.36 (0.004) | 17.36 (0.004) | ||||||||||
| Pan z magnitude | 17.27 (0.006) | 17.27 (0.006) | 17.27 (0.006) | ||||||||||
| Pan y magnitude | 17.18 (0.02) | 17.18 (0.02) | 17.18 (0.02) | ||||||||||
| 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.