All names: Gaia EDR3 4464970798886817664, Gaia DR2 4464970798886817664, GALEX J162017.8+153352, Gaia DR3 4464970798886817664, SDSS J162017.83+153351.90, SDSS J162017.83+153351.9
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 20 17.83 (0.8) | 16 20 17.83 | 16 20 17.83 (0.9) | 16 20 17.83 (0.8) | 16 20 17.83 | |||
| Declination | 15 33 51.68 (1) | 15 33 51.89 | 15 33 51.69 (1) | 15 33 51.91 (1) | 15 33 51.85 | |||
| Spectral type | DB | DB | ||||||
| Effective temperature | [K] | 14141.0 | 15580.0 (756) | |||||
| log(g) | [cgs] | 7.75 | 8.12 (0.5) | |||||
| Mass | [M☉] | 0.454 | 0.655 (0.3) | |||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | <-5.977 | |||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | -0.02 (1) | -0.16 (2) | |||||
| Distance | [pc] | |||||||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -3.86529226 (0.9) | -4.92789714 (2) | -3.865 (0.9) | ||||
| Proper motion (declination) | [mas/yr] | -13.81786417 (0.9) | -17.52769643 (2) | -13.818 (0.9) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | ||||||||
| V magnitude | ||||||||
| R magnitude | ||||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 20.28 (0.06) | 20.31 (0.08) | ||||||
| g magnitude | 20.46 (0.03) | 20.47 (0.03) | 20.47 (0.03) | |||||
| r magnitude | 20.69 (0.04) | 20.74 (0.04) | 20.74 (0.04) | |||||
| i magnitude | 20.98 (0.07) | 20.99 (0.06) | 20.99 (0.06) | |||||
| z magnitude | 21.86 (0.5) | 21.90 (0.5) | 21.90 (0.5) | |||||
| G magnitude | 20.63 (0.09) | 20.71 | 20.63 (0.009) | |||||
| BP magnitude | 20.65 (0.09) | 20.69 | ||||||
| RP magnitude | 20.27 (0.1) | 21.32 | ||||||
| Pan g magnitude | 20.57 (0.02) | |||||||
| Pan r magnitude | 20.77 (0.02) | |||||||
| Pan i magnitude | 20.91 (0.04) | |||||||
| Pan z magnitude | 21.39 (0.2) | |||||||
| Pan y magnitude | ||||||||
| E(B-V) | ||||||||
* 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.