All names: SDSS J044028.46+092342.1, WD 0437+093, EGGR 419, Gaia DR3 3292685210887016192, WDJ044028.48+092347.21, J0440+0923, WD 0437+09, 2MASS J04402847+0923472, USNO-B1.0 0993-00047429, NLTT 13723, PSO J070.1184+09.3936, LP 475-247, TIC 373246275, LSPM J0440+0923, 04404+0923, 0437+093, PM J04404+0923, Gaia DR2 3292685210887016192, LHS 1693, Gaia EDR3 3292685210887016192
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | Kilic et al. 2020 | McCleery et al. 2020 | Blouin et al. 2019 | Leggett et al. 2018 | Gaia DR2 | Stilism | Limoges et al. 2015 | Gianninas et al. 2011 | Bergeron et al. 1997 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 04 40 28.43 (0.05) | 04 40 28.43 (0.07) | 04 40 28.43 (0.07) | 04 40 28.43 | 04 40 28.48 (0.05) | 04 40 28.43 | 04 40 32.09 | ||||||||||||
| Declination | 09 23 35.34 (0.03) | 09 23 35.71 (0.04) | 09 23 35.71 (0.04) | 09 23 35.34 | 09 23 47.21 (0.03) | 09 23 35.71 | 09 24 46.08 | ||||||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA8.0 | DA | DA | DA | DA8.1 | DA8 | |||||||
| Effective temperature | [K] | 6327.0 (33) | 6279.0 (56) | 6340.0 (23) | 6327.0 (34) | 6211.3 (41) | 6185.0 (60) | 6287.0 (114) | 6310.0 (97) | 6230.0 (122) | 6450.0 (140) | 6195.0 (29) | |||||||
| log(g) | [cgs] | 8.29 (0.008) | 8.28 (0.03) | 8.31 (0.008) | 8.29 (0.009) | 8.26 (0.02) | 8.25 (0.02) | 8.33 (0.03) | 8.46 (0.1) | 7.99 (0.2) | 8.00 (0) | 8.25 (0.009) | |||||||
| Mass | [M☉] | 0.776 (0.008) | 0.768 (0.02) | 0.786 (0.007) | 0.777 (0.008) | 0.748 (0.01) | 0.801 (0.03) | 0.89 (0.07) | 0.58 (0.1) | 0.59 | 0.749 (0.008) | ||||||||
| log(Luminosity) | [L☉] | -3.92 | -3.60 | ||||||||||||||||
| Cooling age | [Gyr] | 4.0000 | 3.6970 (0.2) | 4.0100 (0.3) | 1.9500 | ||||||||||||||
| 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] | 30.71 (0.07) | 30.71 (0.07) | 30.77 (0.08) | 30.77 (0.08) | 30.77 (0.08) | 31.74 (0.6) | 30.77 (0.08) | 30.71 | 30.71 (0.07) | 30.77 (0.08) | ||||||||
| Distance | [pc] | 32.56 (0.07) | 32.56 (0.07) | 32.50 (0.08) | 32.49 (0.09) | 32.49 (0.09) | 31.51 (0.6) | 32.49 (0.09) | 29.20 (1) | 38.00 | 32.56 | 32.56 (0.07) | 32.49 (0.09) | ||||||
| Composition | H | H | H | H | H | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -49.52189588 (0.08) | -49.48247294 (0.2) | -49.522 (0.08) | -49.48247294 | ||||||||||||||
| Proper motion (declination) | [mas/yr] | -742.4517384 (0.05) | -742.4383682 (0.08) | -742.452 (0.05) | -742.4383682 | ||||||||||||||
| Variability | |||||||||||||||||||
| Magnetic | |||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||
| Binarity | |||||||||||||||||||
| B magnitude | 17.45 | 17.90 | |||||||||||||||||
| V magnitude | 16.96 | ||||||||||||||||||
| R magnitude | 16.66 | 16.70 | |||||||||||||||||
| I magnitude | 16.29 | ||||||||||||||||||
| J magnitude | 15.96 (0.01) | 15.94 (0.07) | 16.03 | 15.94 (0.07) | |||||||||||||||
| H magnitude | 15.58 (0.1) | 15.58 (0.1) | 15.80 | 15.58 (0.1) | |||||||||||||||
| K magnitude | 15.58 (0.2) | 15.58 (0.2) | 15.81 | 15.58 (0.2) | |||||||||||||||
| u magnitude | 17.84 (0.03) | 17.84 (0.01) | 17.84 (0.01) | ||||||||||||||||
| g magnitude | 17.12 (0.005) | 17.12 (0.005) | |||||||||||||||||
| r magnitude | 16.81 (0.009) | 16.81 (0.005) | |||||||||||||||||
| i magnitude | 16.71 (0.008) | 16.71 (0.006) | |||||||||||||||||
| z magnitude | 16.71 (0.005) | 16.70 (0.01) | |||||||||||||||||
| G magnitude | 16.81 (0.005) | 16.82 | 16.82 | 16.81 | 16.81 (0.003) | 16.82 | |||||||||||||
| BP magnitude | 17.08 (0.005) | 17.08 | 17.08 | ||||||||||||||||
| RP magnitude | 16.40 (0.005) | 16.39 | 16.39 | ||||||||||||||||
| Pan g magnitude | 17.09 (0.006) | 17.09 (0.003) | 17.09 (0.01) | ||||||||||||||||
| Pan r magnitude | 16.82 (0.007) | 16.83 (0.03) | 16.81 (0.009) | ||||||||||||||||
| Pan i magnitude | 16.72 (0.006) | 16.71 (0.006) | 16.71 (0.008) | ||||||||||||||||
| Pan z magnitude | 16.73 (0.001) | 16.75 (0.006) | 16.71 (0.005) | ||||||||||||||||
| Pan y magnitude | 16.74 (0.01) | 16.75 (0.01) | 16.73 (0.01) | ||||||||||||||||
| E(B-V) | 0.000 | ||||||||||||||||||
* 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.