All names: NLTT 43451, J1640+7310, LSPM J1640+7310, 2MASS J16402430+7310341, WD 1641+73, G 257-38, Gaia EDR3 1654560662439820416, USNO-B1.0 1631-00105200, LP 43-146, WD 1641+732, TIC 233499544, EGGR 367, WDJ164024.37+731034.11, Gaia DR2 1654560662439820416, Gaia DR3 1654560662439820416
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 40 23.99 (0.04) | 16 40 24.37 | 16 40 24.00 (0.05) | 16 40 23.99 | 16 40 24.37 (0.04) | 16 40 24.00 | 16 40 21.34 | ||||
| Declination | 73 10 39.17 (0.04) | 73 10 34.11 | 73 10 39.02 (0.06) | 73 10 39.17 | 73 10 34.11 (0.04) | 73 10 39.02 | 73 10 20.64 | ||||
| Spectral type | DQ | DQ | DQ | DC6 | C2 | ||||||
| Effective temperature | [K] | 8485.0 (37) | 8426.0 (275) | 8269.0 (54) | |||||||
| log(g) | [cgs] | 7.96 (0.006) | 7.95 | 7.92 (0.01) | |||||||
| Mass | [M☉] | 0.556 (0.005) | 0.5477 | 0.531 (0.009) | |||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.9500 | 0.9120 | ||||||||
| log(H/He) | |||||||||||
| log(C/He) | -4.87 | -4.9783 (0.05) | |||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 18.68 (0.04) | 18.62 (0.05) | 18.62 | 18.62 (0.05) | 18.68 | 18.68 (0.04) | 18.62 (0.05) | |||
| Distance | [pc] | 53.54 (0.1) | 53.71 (0.1) | 53.71 (0.1) | 53.71 (0.1) | 53.54 | 53.54 (0.1) | 53.71 (0.1) | |||
| Composition | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -102.367 (0.05) | -102.541228 (0.1) | -102.367 (0.05) | -102.541228 | ||||||
| Proper motion (declination) | [mas/yr] | 316.468 (0.06) | 316.6621304 (0.1) | 316.468 (0.06) | 316.6621304 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 16.88 | ||||||||||
| V magnitude | |||||||||||
| R magnitude | 16.20 | ||||||||||
| I magnitude | |||||||||||
| J magnitude | 16.47 (0.1) | 16.47 (0.1) | |||||||||
| H magnitude | 16.29 (0.3) | 16.29 (0.3) | |||||||||
| K magnitude | |||||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 16.49 (0.003) | 16.51 | 16.49 | 16.49 (0.003) | 16.51 | ||||||
| BP magnitude | 16.56 (0.005) | 16.54 | 16.54 | ||||||||
| RP magnitude | 16.34 (0.008) | 16.34 | 16.34 | ||||||||
| Pan g magnitude | 16.54 (0.008) | 16.54 (0.007) | |||||||||
| Pan r magnitude | 16.57 (0.002) | 16.57 (0.002) | |||||||||
| Pan i magnitude | 16.67 (0.003) | 16.67 (0.003) | |||||||||
| Pan z magnitude | 16.80 (0.006) | 16.80 (0.006) | |||||||||
| Pan y magnitude | 16.92 (0.002) | 16.92 (0.002) | |||||||||
| E(B-V) | 0.007 | ||||||||||
* 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.