All names: 1RXS J203455.3-273457, 2MASS J20345458-2734491, WD 2031-277, 1SWASP J203454.59-273449.2, TIC 212254842, MCT 2031-2745, WISEA J203454.55-273450.2, WISE J203454.57-273449.9, EC 20318-2745, Gaia DR2 6799465466213872256, USNO-B1.0 0624-01147163, Gaia EDR3 6799465466213872256, RX J2034-275, UCAC4 313-257316, Gaia DR3 6799465466213872256, GALEX J203454.5-273450
| Parameter | Unit | Gaia EDR3 | Bergeron et al. 2021 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 34 54.58 (0.04) | 20 34 54.58 (0.04) | 20 34 54.58 | 20 34 54.58 (0.04) | 20 34 55.25 | ||||
| Declination | -27 34 49.31 (0.03) | -27 34 49.30 (0.03) | -27 34 49.31 | -27 34 49.20 (0.03) | -27 34 55.92 | ||||
| Spectral type | DA | DA | DA | DA.9 | DA | ||||
| Effective temperature | [K] | 55956.0 (1080) | 54230.0 (962) | ||||||
| log(g) | [cgs] | 7.78 (0.07) | 7.95 (0.06) | ||||||
| Mass | [M☉] | 0.6 (0.03) | 0.68 (0.03) | ||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | 0.0014 | |||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| log(C/H) | |||||||||
| log(N/H) | |||||||||
| log(O/H) | |||||||||
| log(Na/H) | |||||||||
| log(Mg/H) | |||||||||
| log(Al/H) | |||||||||
| log(Si/H) | |||||||||
| log(P/H) | |||||||||
| log(S/H) | |||||||||
| log(Sc/H) | |||||||||
| log(Ti/H) | |||||||||
| log(Cr/H) | |||||||||
| log(Mn/H) | |||||||||
| log(Fe/H) | |||||||||
| log(Ni/H) | |||||||||
| Parallax | [mas] | 5.44 (0.05) | 5.45 (0.06) | 5.44 | 5.44 (0.05) | ||||
| Distance | [pc] | 183.76 (2) | 183.00 | 183.47 (2) | 199.00 | 183.76 | 183.76 (2) | ||
| Composition | H | H | |||||||
| Proper motion (right ascension) | [mas/yr] | -4.012932847 (0.05) | -3.981386552 (0.09) | -4.013 (0.05) | |||||
| Proper motion (declination) | [mas/yr] | -6.692639947 (0.04) | -6.842965691 (0.06) | -6.693 (0.04) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 14.81 | ||||||||
| V magnitude | 15.28 | ||||||||
| R magnitude | 15.53 (0.2) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.76 (0.08) | ||||||||
| H magnitude | 15.78 (0.2) | ||||||||
| K magnitude | |||||||||
| u magnitude | |||||||||
| g magnitude | |||||||||
| r magnitude | |||||||||
| i magnitude | |||||||||
| z magnitude | |||||||||
| G magnitude | 15.07 (0.002) | 15.08 | 15.07 | 15.07 (0.003) | |||||
| BP magnitude | 14.90 (0.002) | 14.83 | |||||||
| RP magnitude | 15.39 (0.002) | 15.39 | |||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.016 | ||||||||
* 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.