All names: LSPM J1731+3705, J1731+3705, USNO-B1.0 1270-00310327, GALEX J173134.3+370519, Gaia DR2 1336442472164656000, NLTT 44986, 2MASS J17313433+3705209, EGGR 545, PG 1729+371, Gaia EDR3 1336442472164656000, GD362, TIC 88844987, WISE J173134.34+370518.5, 1729+371, WISEA J173134.33+370518.4, WD 1729+371, G 204-14, WDJ173134.32+370520.71, GD 362, Gaia DR3 1336442472164656000
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Caron et al. 2023 | Leggett et al. 2018 | MWDD H | Gaia DR2 | Stilism | Xu et al. 2013 | Giammichele et al. 2012 | Zuckerman et al. 2011 | Farihi et al. 2010 | Farihi et al. 2008 | Zuckerman et al. 2007 | Kilic et al. 2006 | Kawka et Vennes 2006 | Gianninas et al. 2004 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 31 34.35 (0.03) | 17 31 34.35 (0.04) | 17 31 34.35 | 17 31 34.32 (0.03) | 17 31 34.35 | 17 31 34.66 | |||||||||||||||
| Declination | 37 05 17.24 (0.03) | 37 05 17.35 (0.04) | 37 05 17.24 | 37 05 20.71 (0.03) | 37 05 17.35 | 37 05 28.32 | |||||||||||||||
| Spectral type | DAZB | DAZB4.9 | DAZB | DAZB | DAZB | DAZB | DAZB | DAZ | DAZ | DAZ | DA | DAZB | DA | ||||||||
| Effective temperature | [K] | 9825.0 (59) | 10057.0 (374) | 10263.0 | 10540.0 | 10560.0 (149) | 10500.0 | 10500.0 | 10500.0 | 10540.0 (200) | 9740.0 | 9760.0 (70) | 9740.0 (50) | 10717.0 (74) | |||||||
| log(g) | [cgs] | 7.99 (0.009) | 7.95 (0.05) | 8.13 | 8.24 | 8.10 (0.04) | 8.24 | 8.24 (0.04) | 9.10 | 9.19 (0.08) | 9.12 (0.07) | 8.20 (0.009) | |||||||||
| Mass | [M☉] | 0.574 (0.007) | 0.551 (0.04) | 0.682 | 0.72 | 0.64 (0.03) | 1.26 (0.03) | 1.24 | 0.727 (0.008) | ||||||||||||
| log(Luminosity) | [L☉] | -2.80 | |||||||||||||||||||
| Cooling age | [Gyr] | 0.6800 | 0.5740 (0.07) | 0.6813 | 0.6500 | ||||||||||||||||
| log(H/He) | -1.5 | -1.14 (0.1) | -1.14 (0.1) | ||||||||||||||||||
| log(C/He) | -7.7 (0.3) | <-5.64 | |||||||||||||||||||
| log(Ca/He) | -7.0 | -6.24 (0.1) | -6.24 | -6.24 (0.1) | |||||||||||||||||
| log(Ca/H) | -5.1 | -5.2 | -5.2 (0.1) | ||||||||||||||||||
| log(N/He) | <-4.14 | <-4.14 | |||||||||||||||||||
| log(O/He) | <-5.14 | <-5.14 | |||||||||||||||||||
| log(Na/He) | -7.79 (0.2) | -7.79 (0.2) | |||||||||||||||||||
| log(Mg/He) | -5.98 (0.2) | -5.98 (0.2) | |||||||||||||||||||
| log(Al/He) | -6.4 (0.2) | -6.4 (0.2) | |||||||||||||||||||
| log(Si/He) | -5.84 (0.3) | -5.84 (0.3) | |||||||||||||||||||
| log(P/He) | |||||||||||||||||||||
| log(S/He) | <-6.70 | ||||||||||||||||||||
| log(Cl/He) | |||||||||||||||||||||
| log(Sc/He) | -10.19 (0.3) | -10.19 (0.3) | |||||||||||||||||||
| log(Ti/He) | -7.95 (0.1) | -7.95 (0.1) | |||||||||||||||||||
| log(V/He) | -8.74 (0.3) | -8.74 (0.3) | |||||||||||||||||||
| log(Cr/He) | -7.41 (0.1) | -7.41 (0.1) | |||||||||||||||||||
| log(Mn/He) | -7.47 (0.1) | -7.47 (0.1) | |||||||||||||||||||
| log(Fe/He) | -5.65 (0.1) | -5.65 (0.1) | |||||||||||||||||||
| log(Co/He) | -8.5 (0.4) | -8.5 (0.4) | |||||||||||||||||||
| log(Ni/He) | -7.07 (0.1) | -7.07 | |||||||||||||||||||
| log(Cu/He) | -9.2 (0.4) | -9.2 (0.4) | |||||||||||||||||||
| log(Zn/He) | |||||||||||||||||||||
| log(Ga/He) | |||||||||||||||||||||
| log(Ge/He) | |||||||||||||||||||||
| log(Sr/He) | -10.42 (0.3) | -10.42 (0.3) | |||||||||||||||||||
| Parallax | [mas] | 17.81 (0.03) | 17.78 (0.04) | 17.49 (0.3) | 17.78 (0.04) | 19.90 (1) | 17.81 | 17.81 (0.03) | 17.78 (0.04) | 45.00 | |||||||||||
| Distance | [pc] | 56.13 (0.1) | 56.24 (0.1) | 57.18 (0.9) | 56.25 (0.1) | 51.00 | 50.30 (2) | 22.00 | 25.00 | 56.13 | 56.13 (0.1) | 56.25 (0.1) | 22.22 | ||||||||
| Composition | He | H | He | He | He | He | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 24.0097577 (0.03) | 23.97489675 (0.08) | 24.01 (0.03) | 23.97489675 | ||||||||||||||||
| Proper motion (declination) | [mas/yr] | -216.9767687 (0.04) | -216.8395583 (0.08) | -216.977 (0.04) | -216.8395583 | ||||||||||||||||
| Variability | |||||||||||||||||||||
| Magnetic | |||||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||||
| Infrared excess (disk) | yes | yes | yes | ||||||||||||||||||
| Binarity | |||||||||||||||||||||
| B magnitude | 16.30 | ||||||||||||||||||||
| V magnitude | 16.23 | 16.23 | |||||||||||||||||||
| R magnitude | 16.40 | ||||||||||||||||||||
| I magnitude | |||||||||||||||||||||
| J magnitude | 16.01 (0.01) | 16.16 (0.09) | |||||||||||||||||||
| H magnitude | |||||||||||||||||||||
| K magnitude | |||||||||||||||||||||
| u magnitude | 16.29 (0.006) | 16.28 (0.006) | |||||||||||||||||||
| g magnitude | 16.02 (0.003) | ||||||||||||||||||||
| r magnitude | 16.14 (0.003) | ||||||||||||||||||||
| i magnitude | 16.24 (0.004) | ||||||||||||||||||||
| z magnitude | 16.43 (0.008) | ||||||||||||||||||||
| G magnitude | 16.03 (0.002) | 16.05 | 16.03 | 16.03 (0.003) | 16.05 | ||||||||||||||||
| BP magnitude | 16.07 (0.002) | 16.06 | 16.06 | ||||||||||||||||||
| RP magnitude | 15.96 (0.003) | 15.97 | 15.97 | ||||||||||||||||||
| Pan g magnitude | 16.01 (0.009) | 16.01 (0.009) | |||||||||||||||||||
| Pan r magnitude | 16.14 (0.003) | 16.14 (0.003) | |||||||||||||||||||
| Pan i magnitude | 16.27 (0.001) | 16.27 (0.002) | |||||||||||||||||||
| Pan z magnitude | 16.45 (0.002) | 16.45 (0.003) | |||||||||||||||||||
| Pan y magnitude | 16.56 (0.004) | 16.56 (0.004) | |||||||||||||||||||
| 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.