All names: GALEX J124054.7+434042, SDSS J124054.82+434043.7, WIRED J124054.82+434043.4, SDSS J124054.82+434043.5, [HHD2009] SDSS J1240+4340, SDSS J124054.82+434043.4, Gaia DR2 1540475099720038656, TIC 115910393, WD 1238+439, Gaia DR3 1540475099720038656, Gaia EDR3 1540475099720038656, LAMOST J124054.82+434043.4, 2MASS J12405480+4340435
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Guo et al. 2015 | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 40 54.82 (0.1) | 12 40 54.82 | 12 40 54.82 (0.1) | 12 40 54.82 | 12 40 54.82 (0.1) | 12 40 54.82 | 12 40 54.70 | 12 40 54.82 | |||||
| Declination | 43 40 43.21 (0.1) | 43 40 43.48 | 43 40 43.22 (0.1) | 43 40 43.39 | 43 40 43.51 (0.1) | 43 40 43.48 | 43 40 39.00 | 43 40 43.48 | |||||
| Spectral type | DA+M | DA+M | DA | DA+M | DA+M | DA dM | DA+M | ||||||
| Effective temperature | [K] | 17707.0 (321) | 18130.0 (350) | 9535.0 (38) | 9565.0 (42) | ||||||||
| log(g) | [cgs] | 7.95 (0.07) | 7.99 (0.06) | 7.95 (0.04) | 7.97 (0.05) | ||||||||
| Mass | [M☉] | 0.59 (0.04) | 0.61 (0.04) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.1072 | |||||||||||
| 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] | 3.62 (0.2) | 3.84 (0.3) | 3.62 (0.2) | |||||||||
| Distance | [pc] | 276.26 (18) | 260.11 (17) | 1019.00 (116) | 276.26 (18) | ||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 3.374926762 (0.2) | 2.860616421 (0.3) | 3.375 (0.2) | 1.9 | ||||||||
| Proper motion (declination) | [mas/yr] | -18.76138593 (0.2) | -19.2545843 (0.3) | -18.761 (0.2) | -20.9 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 15.29 (0.05) | ||||||||||||
| H magnitude | 14.73 (0.07) | ||||||||||||
| K magnitude | 14.39 (0.09) | ||||||||||||
| u magnitude | 18.08 (0.01) | 18.10 | 18.07 (0.01) | 18.09 (0.02) | 18.10 | 18.10 (0.02) | |||||||
| g magnitude | 17.79 (0.005) | 17.80 | 17.79 (0.005) | 17.80 (0.02) | 17.80 | 17.80 (0.02) | |||||||
| r magnitude | 17.87 (0.006) | 17.88 | 17.87 (0.006) | 17.88 (0.01) | 17.88 | 17.88 (0.01) | |||||||
| i magnitude | 17.27 (0.006) | 17.24 | 17.27 (0.006) | 17.24 (0.03) | 17.24 | 17.24 (0.02) | |||||||
| z magnitude | 16.68 (0.008) | 16.69 | 16.68 (0.008) | 16.69 (0.03) | 16.69 | 16.68 (0.03) | |||||||
| G magnitude | 17.57 (0.007) | 17.53 | 17.57 (0.005) | ||||||||||
| BP magnitude | 17.87 (0.007) | 17.83 | |||||||||||
| RP magnitude | 16.79 (0.007) | 16.78 | |||||||||||
| Pan g magnitude | 17.81 (0.007) | ||||||||||||
| Pan r magnitude | 17.86 (0.004) | ||||||||||||
| Pan i magnitude | 17.26 (0.005) | ||||||||||||
| Pan z magnitude | 16.74 (0.007) | ||||||||||||
| Pan y magnitude | 16.42 (0.006) | ||||||||||||
| E(B-V) | 0.018 | ||||||||||||
* 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.