All names: WD 0834+270, GALEX J083722.4+265417, SDSS J083722.44+265417.4, SDSS J083722.44+265417.3, Gaia DR3 703097897386300416, [HHD2009] SDSS J0837+2654, WIRED J083722.44+265417.3, Gaia EDR3 703097897386300416, 2MASS J08372244+2654172, TIC 117159627, Gaia DR2 703097897386300416
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 37 22.43 (0.09) | 08 37 22.44 | 08 37 22.43 (0.1) | 08 37 22.44 | 08 37 22.44 (0.09) | 08 37 22.44 | 08 37 22.20 | 08 37 22.44 | ||||
| Declination | 26 54 17.32 (0.07) | 26 54 17.35 | 26 54 17.32 (0.08) | 26 54 17.32 | 26 54 17.39 (0.07) | 26 54 17.36 | 26 54 11.88 | 26 54 17.36 | ||||
| Spectral type | DA+M | DA | DA+M | DA+M | DA dM | DA+M | ||||||
| Effective temperature | [K] | 15601.0 (737) | 14560.0 (930) | 6300.0 (2) | 6300.0 (2) | |||||||
| log(g) | [cgs] | 8.53 (0.1) | 8.77 (0.09) | 5.03 (0.2) | 5.02 (0.03) | |||||||
| Mass | [M☉] | 0.94 (0.07) | 1.08 (0.05) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 1.0233 | ||||||||||
| 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] | 3.92 (0.1) | 3.91 (0.2) | 3.92 (0.1) | ||||||||
| Distance | [pc] | 255.19 (8) | 255.75 (11) | 255.19 (8) | ||||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -8.27462438 (0.1) | -8.043206623 (0.2) | -8.275 (0.1) | 1.7 | |||||||
| Proper motion (declination) | [mas/yr] | -4.325829835 (0.09) | -4.307817712 (0.2) | -4.326 (0.09) | -2.3 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | WDMS | WDMS | |||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.09 (0.003) | |||||||||||
| H magnitude | 14.50 (0.05) | |||||||||||
| K magnitude | 14.38 (0.07) | |||||||||||
| u magnitude | 18.94 (0.02) | 18.95 | 18.92 (0.02) | 18.95 (0.03) | 18.95 | 18.95 (0.03) | ||||||
| g magnitude | 18.53 (0.007) | 18.51 | 18.52 (0.007) | 18.51 (0.02) | 18.51 | 18.52 (0.02) | ||||||
| r magnitude | 18.17 (0.007) | 18.18 | 18.17 (0.007) | 18.18 (0.02) | 18.18 | 18.18 (0.02) | ||||||
| i magnitude | 17.19 (0.006) | 17.18 | 17.19 (0.006) | 17.18 (0.01) | 17.18 | 17.20 (0.01) | ||||||
| z magnitude | 16.49 (0.009) | 16.47 | 16.49 (0.009) | 16.47 (0.02) | 16.47 | 16.49 (0.02) | ||||||
| G magnitude | 17.68 (0.03) | 17.69 | 17.68 (0.003) | |||||||||
| BP magnitude | 18.41 (0.03) | 18.42 | ||||||||||
| RP magnitude | 16.71 (0.006) | 16.71 | ||||||||||
| Pan g magnitude | 18.49 (0.009) | |||||||||||
| Pan r magnitude | 18.19 (0.004) | |||||||||||
| Pan i magnitude | 17.19 (0.003) | |||||||||||
| Pan z magnitude | 16.61 (0.007) | |||||||||||
| Pan y magnitude | 16.32 (0.007) | |||||||||||
| E(B-V) | 0.013 | |||||||||||
* 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.