All names: KUV 08157+3739, Gaia DR2 907732821090252032, SDSS J081856.04+372949.5, Gaia DR3 907732821090252032, GALEX J081856.0+372950, SDSS J081856.05+372949.5, Gaia EDR3 907732821090252032, SDSS J081856.06+372949.3, WD 0815+376, CBS 70
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 18 56.08 (0.05) | 08 18 56.05 | 08 18 56.08 (0.07) | 08 18 56.08 | 08 18 56.05 (0.05) | 08 18 56.18 | 08 18 56.05 | |||||
| Declination | 37 29 49.35 (0.04) | 37 29 49.52 | 37 29 49.35 (0.06) | 37 29 49.35 | 37 29 49.58 (0.04) | 37 29 47.04 | 37 29 49.51 | |||||
| Spectral type | DA | DA | DA6 | DA6 | DA | DA | ||||||
| Effective temperature | [K] | 22420.0 (370) | 22546.0 (581) | 22713.0 (92) | ||||||||
| log(g) | [cgs] | 8.02 (0.05) | 7.97 (0.03) | 7.88 (0.01) | ||||||||
| Mass | [M☉] | 0.64 (0.03) | 0.615 (0.02) | 0.57 (0.005) | ||||||||
| 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] | 6.39 (0.06) | 6.55 (0.09) | 6.39 | 6.39 (0.06) | |||||||
| Distance | [pc] | 156.43 (2) | 152.68 (2) | 120.00 | 156.43 | 156.43 (2) | ||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 24.42772241 (0.06) | 24.34363272 (0.2) | 24.428 (0.06) | ||||||||
| Proper motion (declination) | [mas/yr] | -14.36767498 (0.05) | -14.32840476 (0.1) | -14.368 (0.05) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | 16.70 | |||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 16.31 (0.006) | 16.31 (0.006) | 16.31 (0.02) | |||||||||
| g magnitude | 16.29 (0.004) | 16.29 (0.004) | 16.31 (0.02) | |||||||||
| r magnitude | 16.69 (0.004) | 16.68 (0.004) | 16.67 (0.02) | |||||||||
| i magnitude | 17.00 (0.006) | 17.00 (0.006) | 16.97 (0.02) | |||||||||
| z magnitude | 17.29 (0.01) | 17.29 (0.01) | 17.29 (0.02) | |||||||||
| G magnitude | 16.51 (0.004) | 16.54 | 16.51 | 16.51 (0.003) | ||||||||
| BP magnitude | 16.42 (0.004) | 16.38 | ||||||||||
| RP magnitude | 16.72 (0.007) | 16.71 | ||||||||||
| Pan g magnitude | 16.36 (0.003) | |||||||||||
| Pan r magnitude | 16.72 (0.003) | |||||||||||
| Pan i magnitude | 17.03 (0.002) | |||||||||||
| Pan z magnitude | 17.30 (0.003) | |||||||||||
| Pan y magnitude | 17.46 (0.07) | |||||||||||
| E(B-V) | 0.008 | |||||||||||
* 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.