All names: GALEX J155459.8+520238, Gaia DR3 1404645242859150336, SDSS J155459.83+520239.3, SDSS J155459.82+520239.1, Gaia DR2 1404645242859150336, SDSS J155459.82+520239.2, SDSS J155459.82+520239.3, Gaia EDR3 1404645242859150336, SDSS J155459.82+520239.20, SBSS 1553+521
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Kepler et al. 2016 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 54 59.83 (0.08) | 15 54 59.83 | 15 54 59.83 (0.1) | 15 54 59.83 | 15 54 59.83 (0.08) | |||||
| Declination | 52 02 39.04 (0.09) | 52 02 39.37 | 52 02 39.05 (0.1) | 52 02 39.04 | 52 02 39.29 (0.09) | |||||
| Spectral type | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 22810.0 (168) | 21564.0 (1107) | |||||||
| log(g) | [cgs] | 7.80 (0.02) | 7.90 (0.06) | |||||||
| Mass | [M☉] | 0.534 (0.008) | 0.572 (0.04) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 3.02 (0.09) | 3.09 (0.1) | 3.02 | 3.02 (0.09) | |||||
| Distance | [pc] | 330.89 (10) | 323.47 (13) | 330.89 | 330.90 (10) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 0.015303495 (0.1) | 0.302450898 (0.2) | 0.015 (0.1) | ||||||
| Proper motion (declination) | [mas/yr] | -15.55572801 (0.1) | -15.33107285 (0.3) | -15.556 (0.1) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 18.00 | |||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.87 (0.01) | 17.86 (0.03) | 17.88 (0.01) | |||||||
| g magnitude | 17.92 (0.006) | 17.93 (0.02) | 17.92 (0.006) | |||||||
| r magnitude | 18.34 (0.008) | 18.36 (0.02) | 18.34 (0.008) | |||||||
| i magnitude | 18.64 (0.01) | 18.65 (0.02) | 18.64 (0.01) | |||||||
| z magnitude | 19.04 (0.05) | 19.08 (0.06) | 19.05 (0.05) | |||||||
| G magnitude | 18.12 (0.01) | 18.15 | 18.12 | 18.12 (0.003) | ||||||
| BP magnitude | 18.05 (0.01) | 18.00 | ||||||||
| RP magnitude | 18.32 (0.02) | 18.31 | ||||||||
| Pan g magnitude | 17.95 (0.002) | |||||||||
| Pan r magnitude | 18.32 (0.006) | |||||||||
| Pan i magnitude | 18.66 (0.004) | |||||||||
| Pan z magnitude | 18.95 (0.01) | |||||||||
| Pan y magnitude | 19.16 (0.05) | |||||||||
| E(B-V) | 0.019 | |||||||||
* 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.