All names: Gaia DR3 4425059759452336128, Gaia EDR3 4425059759452336128, GALEX J155904.6+035623, SBC9 3387, SDSS J155904.62+035623.4, PTF1 J155904.62+035623.5, Gaia DR2 4425059759452336128, WD 1556+040, SDSS J155904.62+035623.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 59 04.62 (0.1) | 15 59 04.62 | 15 59 04.62 (0.2) | 15 59 04.62 | 15 59 04.63 (0.1) | 15 59 04.75 | 15 59 04.62 | |||||
| Declination | 03 56 23.60 (0.1) | 03 56 23.44 | 03 56 23.60 (0.2) | 03 56 23.39 | 03 56 23.49 (0.1) | 03 56 18.60 | 03 56 23.44 | |||||
| Spectral type | DA+M | DA+M | DAe+M | DA1.0 M | DAEM | CV | ||||||
| Effective temperature | [K] | 36116.0 (1952) | 48774.0 (2647) | 49802.0 (1722) | ||||||||
| log(g) | [cgs] | 7.49 (0.3) | 8.21 (0.2) | 7.75 (0.1) | ||||||||
| Mass | [M☉] | 0.44 (0.1) | 0.81 (0.1) | |||||||||
| log(Luminosity) | [L☉] | -0.22 (0.2) | ||||||||||
| Cooling age | [Gyr] | 0.0024 (0.002) | ||||||||||
| 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] | 1.50 (0.2) | 1.50 (0.2) | 1.50 (0.2) | ||||||||
| Distance | [pc] | 665.23 (89) | 665.23 (102) | 142.00 (3) | 665.25 (89) | |||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -7.729523048 (0.2) | -7.573580253 (0.4) | -7.73 (0.2) | ||||||||
| Proper motion (declination) | [mas/yr] | 7.401993742 (0.2) | 7.212451357 (0.3) | 7.402 (0.2) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | yes | ||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 18.24 (0.01) | 18.23 | 18.24 (0.01) | 18.23 | 18.23 (0.02) | |||||||
| g magnitude | 18.39 (0.007) | 18.40 | 18.39 (0.007) | 18.40 | 18.40 (0.02) | |||||||
| r magnitude | 18.58 (0.009) | 18.58 | 18.58 (0.009) | 18.58 | 18.58 (0.01) | |||||||
| i magnitude | 18.68 (0.01) | 18.68 | 18.67 (0.01) | 18.68 | 18.68 (0.02) | |||||||
| z magnitude | 18.66 (0.04) | 18.68 | 18.67 (0.04) | 18.68 | 18.68 (0.04) | |||||||
| G magnitude | 18.52 (0.02) | 18.56 | 18.52 (0.005) | |||||||||
| BP magnitude | 18.51 (0.02) | 18.47 | ||||||||||
| RP magnitude | 18.41 (0.05) | 18.44 | ||||||||||
| Pan g magnitude | 18.47 (0.01) | |||||||||||
| Pan r magnitude | 18.63 (0.02) | |||||||||||
| Pan i magnitude | 18.82 (0.02) | |||||||||||
| Pan z magnitude | 18.82 (0.03) | |||||||||||
| Pan y magnitude | 18.85 (0.05) | |||||||||||
| E(B-V) | 0.055 | |||||||||||
* 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.