All names: SDSS J205721.30+004226.2, [HHD2009] SDSS J2057+0042, Gaia DR3 1729665552953172096, WIRED J205721.30+004226.2, SDSS J205721.31+004226.2, [SGR2010] J2057+0042, WD 2054+005, TIC 396434885, GALEX J205721.2+004225, Gaia EDR3 1729665552953172096, 2MASS J20572130+0042261, Gaia DR2 1729665552953172096
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 57 21.30 (0.1) | 20 57 21.30 | 20 57 21.30 (0.2) | 20 57 21.30 | 20 57 21.30 (0.1) | 20 57 21.30 | 20 57 21.26 | 20 57 21.30 | |||
| Declination | 00 42 26.16 (0.07) | 00 42 26.23 | 00 42 26.16 (0.1) | 00 42 26.21 | 00 42 26.22 (0.07) | 00 42 26.24 | 00 42 24.48 | 00 42 26.24 | |||
| Spectral type | DA+M | DA+M0 | DA:+M | DA: dM | DA:M | ||||||
| Effective temperature | [K] | 33740.0 (2377) | 6300.0 (1) | 6300.0 (3) | |||||||
| log(g) | [cgs] | 8.16 (0.4) | 8.82 (0.1) | 10.00 (0.003) | |||||||
| Mass | [M☉] | 0.75 (0.2) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 0.62 (0.2) | 0.89 (0.2) | 0.62 (0.2) | |||||||
| Distance | [pc] | 1613.55 (411) | 1125.32 (283) | 1613.42 (411) | |||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.112500207 (0.2) | 1.33544635 (0.4) | 1.113 (0.2) | 7.9 | ||||||
| Proper motion (declination) | [mas/yr] | -3.273701205 (0.1) | -3.338087131 (0.3) | -3.274 (0.1) | -0.6 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | |||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 16.13 (0.08) | ||||||||||
| H magnitude | 15.42 (0.08) | ||||||||||
| K magnitude | 15.19 (0.1) | ||||||||||
| u magnitude | 19.70 (0.03) | 19.67 | 19.69 (0.03) | 19.67 (0.03) | 19.67 | 19.67 (0.03) | |||||
| g magnitude | 19.15 (0.01) | 19.12 | 19.09 (0.01) | 19.12 (0.01) | 19.12 | 19.11 (0.01) | |||||
| r magnitude | 18.31 (0.008) | 18.29 | 18.27 (0.008) | 18.29 (0.009) | 18.29 | 18.27 (0.01) | |||||
| i magnitude | 17.72 (0.008) | 17.74 | 17.70 (0.008) | 17.74 (0.01) | 17.74 | 17.71 (0.01) | |||||
| z magnitude | 17.33 (0.01) | 17.36 | 17.36 (0.01) | 17.36 (0.02) | 17.36 | 17.32 (0.02) | |||||
| G magnitude | 18.22 (0.03) | 18.24 | 18.22 (0.003) | ||||||||
| BP magnitude | 18.90 (0.03) | 18.87 | |||||||||
| RP magnitude | 17.35 (0.01) | 17.38 | |||||||||
| Pan g magnitude | 19.10 (0.01) | ||||||||||
| Pan r magnitude | 18.35 (0.004) | ||||||||||
| Pan i magnitude | 17.76 (0.003) | ||||||||||
| Pan z magnitude | 17.46 (0.006) | ||||||||||
| Pan y magnitude | 17.28 (0.006) | ||||||||||
| E(B-V) | 0.051 | ||||||||||
* 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.