All names: EQ J2236+2232, LSPM J2236+2232, LP 400-22, WD 2234+222, 2234+222, J2236+2232, Gaia DR3 1874523804732334464, WD 2234+225, Gaia EDR3 1874523804732334464, SDSS J223630.08+223223.8, Gaia DR2 1874523804732334464, USNO-B1.0 1125-00641426, NLTT 54331, GALEX J223630.1+223224
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Leggett et al. 2018 | Gaia DR2 | Stilism | Gianninas et al. 2014 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 36 30.25 (0.06) | 22 36 30.24 (0.09) | 22 36 30.25 | 22 36 30.01 (0.06) | 22 36 28.82 | |||||
| Declination | 22 32 24.47 (0.08) | 22 32 24.45 (0.1) | 22 32 24.47 | 22 32 23.66 (0.08) | 22 32 16.44 | |||||
| Spectral type | DA | DA | DA+DA | DA | ||||||
| Effective temperature | [K] | 11360.0 (170) | 11341.0 (167) | |||||||
| log(g) | [cgs] | 6.53 (0.04) | 6.14 (0.1) | |||||||
| Mass | [M☉] | 0.182 | 0.083 (0.02) | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | 1.1060 (0.2) | ||||||||
| 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] | 2.73 (0.08) | 0.83 (0.3) | 2.83 (0.1) | 2.73 | 2.73 (0.08) | ||||
| Distance | [pc] | 365.80 (11) | 1204.82 (377) | 353.53 (16) | 359.00 (44) | 365.80 | 365.79 (11) | |||
| Composition | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 202.9857533 (0.09) | 202.9410257 (0.2) | 202.986 (0.09) | ||||||
| Proper motion (declination) | [mas/yr] | 50.7853085 (0.1) | 50.6362465 (0.2) | 50.785 (0.1) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | yes | ||||||||
| B magnitude | 17.50 | |||||||||
| V magnitude | ||||||||||
| R magnitude | 17.10 | |||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.89 (0.01) | |||||||||
| g magnitude | 17.16 (0.004) | |||||||||
| r magnitude | 17.35 (0.005) | |||||||||
| i magnitude | 17.59 (0.006) | |||||||||
| z magnitude | 17.77 (0.02) | |||||||||
| G magnitude | 17.25 (0.005) | 17.27 | 17.25 | 17.25 (0.003) | ||||||
| BP magnitude | 17.28 (0.005) | 17.28 | ||||||||
| RP magnitude | 17.27 (0.006) | 17.26 | ||||||||
| Pan g magnitude | 17.19 (0.004) | |||||||||
| Pan r magnitude | 17.36 (0.002) | |||||||||
| Pan i magnitude | 17.56 (0.003) | |||||||||
| Pan z magnitude | 17.78 (0.01) | |||||||||
| Pan y magnitude | 17.86 (0.03) | |||||||||
| E(B-V) | 0.046 | |||||||||
* 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.