All names: WD 0928+399, Gaia DR2 813192271553369728, TIC 450297364, 2MASS J09315566+3946076, SDSS J093155.66+394607.7, SDSS J093155.67+394607.8, SDSS J093155.60+394607.7, Gaia DR3 813192271553369728, KUV 09288+3959, LAMOST J093155.66+394607.7, GALEX J093155.6+394607, SDSS J093155.66+394607.8, Gaia EDR3 813192271553369728, [HHD2009] SDSS J0931+3946
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Gianninas et al. 2011 | 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 | 09 31 55.63 (0.06) | 09 31 55.66 | 09 31 55.63 (0.08) | 09 31 55.66 | 09 31 55.67 (0.06) | 09 31 55.67 | 09 31 55.66 | 09 31 55.67 | ||||||
| Declination | 39 46 07.57 (0.05) | 39 46 07.85 | 39 46 07.58 (0.08) | 39 46 07.72 | 39 46 07.85 (0.05) | 39 46 07.83 | 39 46 01.92 | 39 46 07.80 | ||||||
| Spectral type | DA+M | DA | DA | DA+dMe | DA+M | DA | DA+M | DA | ||||||
| Effective temperature | [K] | 25012.0 (475) | 26360.0 (515) | 26730.0 (390) | 8887.0 (33) | 8777.0 (38) | ||||||||
| log(g) | [cgs] | 8.08 (0.06) | 8.07 (0.07) | 8.10 (0.06) | 8.67 (0.04) | 8.46 (0.04) | ||||||||
| Mass | [M☉] | 0.68 (0.04) | 0.68 (0.04) | 0.69 (0.04) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 0.0214 | ||||||||||||
| 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] | 3.78 (0.09) | 4.05 (0.1) | 3.78 (0.09) | ||||||||||
| Distance | [pc] | 264.78 (6) | 247.15 (7) | 570.00 (70) | 272.00 | 264.78 (6) | ||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -29.19481276 (0.07) | -29.32382477 (0.2) | -29.195 (0.07) | -28.9 | |||||||||
| Proper motion (declination) | [mas/yr] | -17.28252348 (0.06) | -17.476747 (0.2) | -17.283 (0.06) | -15.8 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | WDMS | WDMS | WDMS | |||||||||||
| B magnitude | ||||||||||||||
| V magnitude | 17.53 | |||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 15.05 (0.04) | |||||||||||||
| H magnitude | 14.45 (0.06) | |||||||||||||
| K magnitude | 14.10 (0.06) | |||||||||||||
| u magnitude | 17.10 (0.007) | 17.11 | 17.10 (0.007) | 17.11 (0.01) | 17.10 | 17.08 (0.01) | ||||||||
| g magnitude | 17.18 (0.004) | 17.24 | 17.19 (0.004) | 17.24 (0.03) | 17.23 | 17.22 (0.03) | ||||||||
| r magnitude | 17.36 (0.005) | 17.41 | 17.36 (0.005) | 17.41 (0.02) | 17.41 | 17.40 (0.02) | ||||||||
| i magnitude | 16.84 (0.005) | 16.92 | 16.86 (0.005) | 16.92 (0.04) | 16.91 | 16.91 (0.04) | ||||||||
| z magnitude | 16.31 (0.008) | 16.39 | 16.32 (0.008) | 16.39 (0.02) | 16.38 | 16.37 (0.02) | ||||||||
| G magnitude | 17.01 (0.007) | 17.02 | 17.01 (0.003) | |||||||||||
| BP magnitude | 17.26 (0.007) | 17.23 | ||||||||||||
| RP magnitude | 16.43 (0.004) | 16.45 | ||||||||||||
| Pan g magnitude | 17.23 (0.007) | |||||||||||||
| Pan r magnitude | 17.35 (0.007) | |||||||||||||
| Pan i magnitude | 16.88 (0.002) | |||||||||||||
| Pan z magnitude | 16.47 (0.004) | |||||||||||||
| Pan y magnitude | 16.23 (0.004) | |||||||||||||
| 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.