All names: SDSS J170459.71+384433.0, [SGR2010] J1704+3844, 2MASS J17045971+3844330, [HHD2009] SDSS J1704+3844, SDSS J170459.70+384433.2, Gaia DR3 1341326120562352512, WD 1703+388, TIC 82610478, SDSS J170459.70+384432.9, SDSS J170459.70+384433.0, Gaia EDR3 1341326120562352512, Gaia DR2 1341326120562352512, GALEX J170459.7+384432, WIRED J170459.70+384432.9
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 04 59.70 (0.07) | 17 04 59.71 | 17 04 59.70 (0.1) | 17 04 59.70 | 17 04 59.71 (0.07) | 17 04 59.71 | 17 04 58.70 | 17 04 59.71 | |||||
| Declination | 38 44 33.38 (0.08) | 38 44 32.94 | 38 44 33.37 (0.1) | 38 44 32.89 | 38 44 32.95 (0.08) | 38 44 32.99 | 38 44 28.32 | 38 44 32.97 | |||||
| Spectral type | DA+M | DA | DA+M | DA+M | DA+M | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 19868.0 (553) | 22080.0 (590) | 8912.0 (44) | 8727.0 (50) | ||||||||
| log(g) | [cgs] | 7.78 (0.1) | 7.92 (0.09) | 8.39 (0.06) | 7.97 (0.08) | ||||||||
| Mass | [M☉] | 0.51 (0.05) | 0.58 (0.04) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.0398 | |||||||||||
| 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] | 2.77 (0.09) | 2.67 (0.1) | 2.77 (0.09) | |||||||||
| Distance | [pc] | 361.37 (11) | 375.05 (18) | 361.36 (11) | |||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -8.739755812 (0.09) | -8.652067671 (0.2) | -8.74 (0.09) | -7.5 | ||||||||
| Proper motion (declination) | [mas/yr] | 26.70161537 (0.1) | 26.78168808 (0.2) | 26.702 (0.1) | 28.1 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | WDMS | WDMS | WDMS | WDMS | |||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.17 (0.08) | ||||||||||||
| H magnitude | 15.63 (0.1) | ||||||||||||
| K magnitude | 15.20 (0.1) | ||||||||||||
| u magnitude | 18.53 (0.01) | 18.46 | 18.46 (0.01) | 18.46 (0.02) | 18.46 | 18.47 (0.02) | |||||||
| g magnitude | 18.34 (0.007) | 18.34 | 18.34 (0.007) | 18.34 (0.01) | 18.34 | 18.34 (0.01) | |||||||
| r magnitude | 18.39 (0.008) | 18.37 | 18.38 (0.008) | 18.37 (0.01) | 18.37 | 18.38 (0.01) | |||||||
| i magnitude | 17.92 (0.008) | 17.92 | 17.91 (0.008) | 17.92 (0.01) | 17.91 | 17.92 (0.01) | |||||||
| z magnitude | 17.46 (0.01) | 17.45 | 17.45 (0.01) | 17.45 (0.02) | 17.45 | 17.45 (0.02) | |||||||
| G magnitude | 18.08 (0.01) | 18.09 | 18.08 (0.003) | ||||||||||
| BP magnitude | 18.39 (0.01) | 18.32 | |||||||||||
| RP magnitude | 17.50 (0.01) | 17.49 | |||||||||||
| Pan g magnitude | 18.35 (0.005) | ||||||||||||
| Pan r magnitude | 18.38 (0.005) | ||||||||||||
| Pan i magnitude | 17.91 (0.004) | ||||||||||||
| Pan z magnitude | 17.54 (0.002) | ||||||||||||
| Pan y magnitude | 17.32 (0.02) | ||||||||||||
| E(B-V) | 0.023 | ||||||||||||
* 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.