All names: Gaia DR2 1613366187994903040, Gaia EDR3 1613366187994903040, SDSS J150440.23+580422.0, WD 1503+582, Gaia DR3 1613366187994903040, SDSS J150440.23+580421.9, GALEX J150440.2+580422, SDSS J150440.22+580421.7
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 04 40.23 (1) | 15 04 40.22 | 15 04 40.23 (2) | 15 04 40.22 (1) | 15 04 40.23 | 15 04 40.34 | 15 04 40.23 | ||||
| Declination | 58 04 21.55 (1) | 58 04 21.75 | 58 04 21.57 (2) | 58 04 21.96 (1) | 58 04 21.95 | 58 04 18.12 | 58 04 21.95 | ||||
| Spectral type | DA | DA | DA_auto | DA | DAH | DA | |||||
| Effective temperature | [K] | 33794.0 (3074) | 33803.0 (1859) | 33600.0 (1882) | |||||||
| log(g) | [cgs] | 7.32 (0.6) | 7.85 (0.4) | 7.99 (0.5) | |||||||
| Mass | [M☉] | 0.39 (0.2) | |||||||||
| log(Luminosity) | [L☉] | -0.23 (0.4) | |||||||||
| Cooling age | [Gyr] | 0.0008 (0.0008) | |||||||||
| 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] | 0.95 (0.8) | 0.95 (0.8) | ||||||||
| Distance | [pc] | 1056.95 (898) | 1056.97 (898) | ||||||||
| Composition | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 4.495303536 (1) | 4.495 (1) | ||||||||
| Proper motion (declination) | [mas/yr] | -25.40010322 (2) | -25.4 (2) | ||||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.19 (0.04) | 20.09 (0.04) | 20.14 (0.04) | 20.14 | 20.14 (0.04) | ||||||
| g magnitude | 20.45 (0.02) | 20.37 (0.02) | 20.42 (0.02) | 20.42 | 20.42 (0.02) | ||||||
| r magnitude | 20.93 (0.04) | 20.82 (0.04) | 20.90 (0.04) | 20.90 | 20.90 (0.04) | ||||||
| i magnitude | 21.25 (0.08) | 21.17 (0.07) | 21.24 (0.06) | 21.24 | 21.24 (0.06) | ||||||
| z magnitude | 21.84 (0.3) | 21.80 (0.4) | 21.74 (0.3) | 21.74 | 21.75 (0.3) | ||||||
| G magnitude | 20.67 (0.1) | 20.76 | 20.67 (0.01) | ||||||||
| BP magnitude | 20.62 (0.1) | 20.76 | |||||||||
| RP magnitude | 20.17 (0.3) | 20.76 | |||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.020 | ||||||||||
* 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.