All names: SDSS J131745.60+420930.5, Gaia DR2 1526177325389630464, GALEX J131745.6+420930, USNO-A2.0 1275-08227850, SDSS J131745.62+420930.9, Gaia DR3 1526177325389630464, Gaia EDR3 1526177325389630464, SDSS J131745.61+420930.8
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Koester & Kepler 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 13 17 45.60 (0.04) | 13 17 45.60 (0.05) | 13 17 45.60 | 13 17 45.63 (0.04) | ||||
| Declination | 42 09 30.37 (0.05) | 42 09 30.38 (0.06) | 42 09 30.37 | 42 09 30.95 (0.05) | ||||
| Spectral type | DB | DB | DB | |||||
| Effective temperature | [K] | 13990.0 (40) | 13595.0 (208) | |||||
| log(g) | [cgs] | 8.00 (0) | 8.05 (0.02) | |||||
| Mass | [M☉] | 0.616 (0.02) | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | -5.18 (0.1) | |||||||
| log(C/He) | ||||||||
| log(Ca/He) | <-8.95 | |||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | 7.38 (0.07) | 7.21 (0.1) | 7.38 | 7.38 (0.07) | |||
| Distance | [pc] | 135.44 (1) | 138.61 (2) | 142.00 | 135.44 | 135.44 (1) | ||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -21.68317443 (0.05) | -21.64 (0.09) | -21.683 (0.05) | ||||
| Proper motion (declination) | [mas/yr] | -36.60821186 (0.06) | -36.465 (0.1) | -36.608 (0.06) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 16.70 (0.3) | |||||||
| V magnitude | ||||||||
| R magnitude | 17.00 (0.3) | |||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 17.11 (0.008) | |||||||
| g magnitude | 17.13 (0.004) | |||||||
| r magnitude | 17.39 (0.005) | |||||||
| i magnitude | 17.58 (0.007) | |||||||
| z magnitude | 17.82 (0.02) | |||||||
| G magnitude | 17.25 (0.004) | 17.27 | 17.25 | 17.25 (0.003) | ||||
| BP magnitude | 17.21 (0.004) | 17.16 | ||||||
| RP magnitude | 17.27 (0.009) | 17.25 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| 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.