All names: Gaia EDR3 4578913738632417920, PM J18161+2454, 18161+2454, Gaia DR2 4578913738632417920, WD 1814+24, WD 1814+248, LSPM J1816+2454, USNO-B1.0 1149-00280871, 2MASS J18160881+2454442, G 183-35, PSO J274.0368+24.9103, 1814+248, NLTT 46206, WDJ181608.87+245442.85, J1816+2454, GALEX J181608.8+245441, Gaia DR3 4578913738632417920, TIC 84795215
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | Leggett et al. 2018 | Gaia DR2 | Stilism | Ferrario et al. 2015 | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 16 08.84 (0.03) | 18 16 08.84 (0.03) | 18 16 08.84 (0.03) | 18 16 08.84 | 18 16 08.87 (0.03) | 18 16 08.84 | 18 16 08.83 | |||||||||
| Declination | 24 54 36.94 (0.04) | 24 54 37.13 (0.05) | 24 54 37.13 (0.05) | 24 54 36.94 | 24 54 42.85 (0.04) | 24 54 37.13 | 24 54 48.24 | |||||||||
| Spectral type | DAP | DAP | DAP | DAP | DAP7.3 | DA | DAP | DA: | DAP8 | DC7 | ||||||
| Effective temperature | [K] | 6800.0 (64) | 6880.0 (19) | 6687.2 (33) | 6740.0 (55) | 6868.0 (170) | 6500.0 (500) | 6920.0 (115) | 6785.0 (34) | |||||||
| log(g) | [cgs] | 8.28 (0.02) | 8.32 (0.005) | 8.25 (0.01) | 8.27 (0.02) | 8.07 (0.06) | 8.00 (0) | 8.00 (0) | 8.28 (0.009) | |||||||
| Mass | [M☉] | 0.766 (0.02) | 0.794 (0.005) | 0.764 (0.01) | 0.633 (0.05) | 0.59 (0.1) | 0.766 (0.008) | |||||||||
| log(Luminosity) | [L☉] | -3.48 | ||||||||||||||
| Cooling age | [Gyr] | 3.2200 | 2.9730 (0.1) | 1.7720 (0.2) | ||||||||||||
| 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] | 26.57 (0.05) | 26.57 (0.05) | 26.56 (0.06) | 26.56 (0.06) | 26.56 (0.06) | 22.48 (0.9) | 26.56 (0.06) | 26.57 | 26.57 (0.05) | 26.56 (0.06) | |||||
| Distance | [pc] | 37.64 (0.07) | 37.64 (0.07) | 37.65 (0.09) | 37.65 (0.09) | 37.65 (0.09) | 44.48 (2) | 37.65 (0.09) | 46.70 (8) | 37.64 | 37.64 (0.07) | 37.65 (0.09) | ||||
| Composition | H | H | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -20.50583436 (0.04) | -20.58838473 (0.07) | -20.506 (0.04) | -20.58838473 | |||||||||||
| Proper motion (declination) | [mas/yr] | -369.1935022 (0.05) | -369.1150802 (0.1) | -369.194 (0.05) | -369.1150802 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | yes | |||||||||||||||
| Bd | [MG] | 14 | ||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | 16.40 | |||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | 16.90 | |||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 16.17 (0.01) | 16.08 (0.09) | 16.08 (0.09) | |||||||||||||
| H magnitude | 16.08 (0.2) | 16.11 (0.2) | 16.11 (0.2) | |||||||||||||
| K magnitude | 15.52 (0.3) | 15.51 (0.3) | 15.51 (0.3) | |||||||||||||
| u magnitude | ||||||||||||||||
| g magnitude | 17.05 (0.003) | |||||||||||||||
| r magnitude | 16.85 (0.005) | |||||||||||||||
| i magnitude | 16.81 (0.005) | |||||||||||||||
| z magnitude | 16.83 (0.008) | |||||||||||||||
| G magnitude | 16.82 (0.005) | 16.84 | 16.84 | 16.82 | 16.82 (0.003) | 16.84 | ||||||||||
| BP magnitude | 17.03 (0.005) | 17.03 | 17.03 | |||||||||||||
| RP magnitude | 16.46 (0.004) | 16.46 | 16.46 | |||||||||||||
| Pan g magnitude | 17.05 (0.003) | 17.04 (0.002) | 17.05 (0.003) | |||||||||||||
| Pan r magnitude | 16.85 (0.005) | 16.87 (0.0001) | 16.85 (0.005) | |||||||||||||
| Pan i magnitude | 16.81 (0.004) | 16.81 (0.008) | 16.81 (0.005) | |||||||||||||
| Pan z magnitude | 16.83 (0.01) | 16.82 (0.007) | 16.83 (0.008) | |||||||||||||
| Pan y magnitude | 16.86 (0.002) | 16.87 (0.01) | 16.86 (0.002) | |||||||||||||
| E(B-V) | 0.003 | |||||||||||||||
* 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.