All names: RE J2024-42, EC 20205-4234, MCT 2020-4234, 1RXS J202400.4-422429, Gaia DR3 6679362959252072832, Gaia EDR3 6679362959252072832, RE J202359-422425, WD 2020-425, RE J2023-422, RBS 1679, 2MASS J20235950-4224257, Gaia DR2 6679362959252072832, EUVE J2024-42.4, USNO-B1.0 0475-00938485, TIC 425819601, WD2020-425, WDJ202359.51-422425.85
| Parameter | Unit | Gaia EDR3 | Bergeron et al. 2021 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Koester et al. 2009 | Koester et al. 2001 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 23 59.50 (0.03) | 20 23 59.50 (0.05) | 20 23 59.60 | 20 23 59.50 | 20 23 59.51 (0.03) | 20 23 59.50 | 20 23 58.56 | |||||
| Declination | -42 24 25.45 (0.03) | -42 24 25.46 (0.03) | -42 24 27.00 | -42 24 25.45 | -42 24 25.85 (0.03) | -42 24 25.46 | -42 24 23.04 | |||||
| Spectral type | DA | DA | DA | DA | DA1.6 | DA | ||||||
| Effective temperature | [K] | 29621.0 (515) | 31220.0 (477) | 28412.0 (26) | 28531.0 (57) | 25083.0 (313) | ||||||
| log(g) | [cgs] | 8.21 (0.07) | 8.03 (0.06) | 8.14 (0.005) | 8.25 (0.01) | 7.67 (0.01) | ||||||
| Mass | [M☉] | 0.764 (0.04) | 0.67 (0.03) | 0.79 | 0.477 (0.007) | |||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.0134 | ||||||||||
| 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] | 10.12 (0.05) | 10.06 (0.07) | 10.12 | 10.12 (0.05) | 10.06 (0.07) | ||||||
| Distance | [pc] | 98.80 (0.5) | 98.00 | 99.42 (0.7) | 97.00 | 98.80 | 98.80 (0.5) | 99.42 (0.7) | ||||
| Composition | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -3.361869273 (0.04) | -3.442415913 (0.09) | -3.362 (0.04) | -3.442415913 | |||||||
| Proper motion (declination) | [mas/yr] | 24.94112319 (0.04) | 25.01997379 (0.07) | 24.941 (0.04) | 25.01997379 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 14.70 | |||||||||||
| V magnitude | 14.87 | 14.87 | 14.89 | |||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.40 (0.04) | |||||||||||
| H magnitude | 15.61 (0.1) | |||||||||||
| K magnitude | 15.64 (0.2) | |||||||||||
| u magnitude | ||||||||||||
| g magnitude | ||||||||||||
| r magnitude | ||||||||||||
| i magnitude | ||||||||||||
| z magnitude | ||||||||||||
| G magnitude | 14.83 (0.001) | 14.85 | 14.83 | 14.83 (0.003) | 14.85 | |||||||
| BP magnitude | 14.71 (0.001) | 14.65 | 14.65 | |||||||||
| RP magnitude | 15.07 (0.002) | 15.07 | 15.07 | |||||||||
| Pan g magnitude | ||||||||||||
| Pan r magnitude | ||||||||||||
| Pan i magnitude | ||||||||||||
| Pan z magnitude | ||||||||||||
| Pan y magnitude | ||||||||||||
| E(B-V) | 0.006 | |||||||||||
* 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.