All names: SDSS J133754.88+344911.2, Gaia DR2 1471595712760930560, SDSS J133754.88+344911.0, LAMOST J133754.88+344911.0, SDSS J133754.88+344911.20, Gaia DR3 1471595712760930560, GALEX J133754.9+344911, Gaia EDR3 1471595712760930560, SDSS J133754.87+344911.2
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Genest-Beaulieu & Bergeron 2019 (photometric) | Gaia DR2 | Stilism | Koester & Kepler 2015 | Vincent et al. 2024 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 13 37 54.89 (0.1) | 13 37 54.87 | 13 37 54.89 (0.1) | 13 37 54.89 | 13 37 54.87 (0.1) | 13 37 54.88 | |||||||
| Declination | 34 49 11.06 (0.08) | 34 49 11.23 | 34 49 11.07 (0.1) | 34 49 11.06 | 34 49 11.41 (0.08) | 34 49 11.24 | |||||||
| Spectral type | DB | DB | DB | DB | |||||||||
| Effective temperature | [K] | 22494.0 | 19019.0 | 20809.0 (346) | 21238.0 (1446) | 22086.0 (697) | |||||||
| log(g) | [cgs] | 8.18 | 8.04 | 8.04 (0.06) | 8.01 (0.07) | 8.11 (0.06) | |||||||
| Mass | [M☉] | 0.707 | 0.62 | 0.607 (0.06) | 0.661 (0.04) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | ||||||||||||
| log(H/He) | -4.166 | <-3.83 | |||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | <-4.44 | ||||||||||||
| log(Ca/H) | |||||||||||||
| Parallax | [mas] | 2.83 (0.1) | 3.10 (0.2) | 2.83 | 2.83 (0.1) | ||||||||
| Distance | [pc] | 352.78 (18) | 322.46 (20) | 342.00 | 352.78 | 352.78 (18) | |||||||
| Composition | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 11.55434633 (0.1) | 11.92409609 (0.2) | 11.554 (0.1) | |||||||||
| Proper motion (declination) | [mas/yr] | -21.52147816 (0.1) | -21.80539437 (0.2) | -21.521 (0.1) | |||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 18.11 (0.01) | 18.11 (0.01) | 18.11 (0.02) | ||||||||||
| g magnitude | 18.18 (0.006) | 18.17 (0.006) | 18.17 (0.03) | ||||||||||
| r magnitude | 18.56 (0.008) | 18.55 (0.008) | 18.58 (0.01) | ||||||||||
| i magnitude | 18.76 (0.01) | 18.75 (0.01) | 18.78 (0.02) | ||||||||||
| z magnitude | 19.10 (0.04) | 19.10 (0.04) | 19.12 (0.04) | ||||||||||
| G magnitude | 18.38 (0.01) | 18.42 | 18.38 | 18.38 (0.003) | |||||||||
| BP magnitude | 18.30 (0.01) | 18.23 | |||||||||||
| RP magnitude | 18.54 (0.02) | 18.48 | |||||||||||
| Pan g magnitude | 18.25 (0.005) | ||||||||||||
| Pan r magnitude | 18.55 (0.01) | ||||||||||||
| Pan i magnitude | 18.85 (0.009) | ||||||||||||
| Pan z magnitude | 19.07 (0.009) | ||||||||||||
| Pan y magnitude | 19.20 (0.03) | ||||||||||||
| 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.