All names: PG 1707+476, GALEX J170909.4+473134, WD 1707+475, TIC 219083245, Gaia DR3 1359999062113290496, WISEA J170909.52+473134.6, WISE J170909.51+473134.6, Gaia EDR3 1359999062113290496, UCAC4 688-059566, WDJ170909.53+473134.68, Gaia DR2 1359999062113290496, 2MASS J17090954+4731344
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 09 09.48 (0.1) | 17 09 09.48 (0.2) | 17 09 09.48 | 17 09 09.53 (0.1) | 17 09 09.48 | 17 09 08.59 | |||
| Declination | 47 31 34.70 (0.1) | 47 31 34.70 (0.2) | 47 31 34.70 | 47 31 34.68 (0.1) | 47 31 34.70 | 47 30 52.56 | |||
| Spectral type | DA | DA | DA1.8 | DA2 | |||||
| Effective temperature | [K] | 27440.0 (420) | 22329.0 (266) | ||||||
| log(g) | [cgs] | 7.82 (0.05) | 7.77 (0.01) | ||||||
| Mass | [M☉] | 0.55 (0.02) | 0.51 (0.01) | ||||||
| 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] | 10.38 (0.1) | 10.40 (0.2) | 10.38 | 10.38 (0.1) | 10.40 (0.2) | |||
| Distance | [pc] | 96.32 (1) | 96.18 (2) | 113.00 | 96.32 | 96.32 (1) | 96.18 (2) | ||
| Composition | H | ||||||||
| Proper motion (right ascension) | [mas/yr] | -30.11649847 (0.1) | -30.56825909 (0.3) | -30.116 (0.1) | -30.56825909 | ||||
| Proper motion (declination) | [mas/yr] | 1.50422419 (0.1) | 0.902526574 (0.3) | 1.504 (0.1) | 0.902526574 | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.10 (0.03) | ||||||||
| V magnitude | 15.20 (0.04) | ||||||||
| R magnitude | 15.62 (0.2) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.54 (0.06) | ||||||||
| H magnitude | 15.74 (0.2) | ||||||||
| K magnitude | |||||||||
| u magnitude | |||||||||
| g magnitude | |||||||||
| r magnitude | |||||||||
| i magnitude | |||||||||
| z magnitude | |||||||||
| G magnitude | 15.20 (0.002) | 15.20 | 15.20 | 15.20 (0.003) | 15.20 | ||||
| BP magnitude | 15.09 (0.002) | 15.05 | 15.05 | ||||||
| RP magnitude | 15.35 (0.002) | 15.35 | 15.35 | ||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.019 | ||||||||
* 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.