All names: 2MASS J04221133-4741421, GALEX J042211.4-474141, HE0420-4748, WDJ042211.36-474142.02, Gaia EDR3 4788896304637763072, HE 0420-4748, Gaia DR3 4788896304637763072, TIC 153708460, Gaia DR2 4788896304637763072, WD 0420-478, EC 04207-4748
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Koester et al. 2014 | Voss et al. 2007 | Koester et al. 2001 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 04 22 11.26 (0.02) | 04 22 11.26 (0.03) | 04 22 11.40 | 04 22 11.26 | 04 22 11.36 (0.02) | 04 22 11.26 | 04 22 10.87 | ||||
| Declination | -47 41 41.89 (0.03) | -47 41 41.89 (0.03) | -47 41 42.00 | -47 41 41.89 | -47 41 42.01 (0.03) | -47 41 41.89 | -47 41 38.04 | ||||
| Spectral type | DB | DB | DB | DB2.1 | |||||||
| Effective temperature | [K] | 25970.0 (500) | 27288.0 | 24285.0 (204) | 25094.0 (688) | ||||||
| log(g) | [cgs] | 7.79 (0.08) | 7.81 | 8.16 (0.02) | 8.00 (0.01) | ||||||
| Mass | [M☉] | 0.512 | 0.604 (0.008) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | -5.6 | ||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | <-8.4 | ||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 10.92 (0.03) | 10.97 (0.03) | 10.92 | 10.92 (0.03) | 10.97 (0.03) | |||||
| Distance | [pc] | 91.62 (0.2) | 91.17 (0.3) | 91.62 | 91.62 (0.2) | 91.17 (0.3) | |||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -63.58521595 (0.03) | -63.64530489 (0.06) | -63.585 (0.03) | -63.64530489 | ||||||
| Proper motion (declination) | [mas/yr] | 7.779721372 (0.03) | 7.981634184 (0.08) | 7.78 (0.03) | 7.981634184 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 14.70 | 14.70 | 15.10 | ||||||||
| V magnitude | 15.24 | ||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.86 (0.07) | ||||||||||
| H magnitude | 15.58 (0.1) | ||||||||||
| K magnitude | |||||||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | 15.23 (0.004) | 15.25 | 15.23 | 15.23 (0.003) | 15.25 | ||||||
| BP magnitude | 15.13 (0.004) | 15.09 | 15.09 | ||||||||
| RP magnitude | 15.42 (0.004) | 15.43 | 15.43 | ||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.001 | ||||||||||
* 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.