All names: SDSS J220031.65-071507.6, SDSS J220031.67-071507.6, Gaia EDR3 2620293237290015232, ** SKF 1777A, Gaia DR3 2620293237290015232, WD 2157-074, Gaia DR2 2620293237290015232, WDS J22005-0715A, WIRED J220031.65-071507.6, SDSS J220031.65-071507.5, GALEX J220031.5-071506
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Tremblay et al. 2011 | Vincent et al. 2024 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 00 31.75 (0.3) | 22 00 31.68 | 22 00 31.75 (0.6) | 22 00 31.65 | 22 00 31.75 | 22 00 31.64 (0.3) | 22 00 31.65 | 22 00 31.13 | 22 00 31.65 | |||||
| Declination | -07 15 07.62 (0.2) | -07 15 07.62 | -07 15 07.62 (0.3) | -07 15 07.60 | -07 15 07.62 | -07 15 07.59 (0.2) | -07 15 07.61 | -07 15 03.60 | -07 15 07.62 | |||||
| Spectral type | DA+M | DA+M | DA | DA | DA | DA+M | DA d | DA+M | DA+MS | |||||
| Effective temperature | [K] | 8878.0 | 8977.0 (104) | 9050.0 (110) | 6689.0 (210) | 8586.0 (56) | 8326.0 (61) | |||||||
| log(g) | [cgs] | 7.92 | 8.09 (0.2) | 8.27 (0.1) | 7.06 (0.09) | 7.85 (0.1) | 7.30 (0.2) | |||||||
| Mass | [M☉] | 0.552 | 0.65 (0.2) | 0.77 (0.09) | 0.208 (0.03) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 0.7378 | 1.2023 | |||||||||||
| 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] | 6.05 (0.3) | 5.72 (0.8) | 6.05 | 6.05 (0.3) | |||||||||
| Distance | [pc] | 165.35 (8) | 174.95 (25) | 501.00 (356) | 165.35 | 165.35 (8) | ||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 105.8600175 (0.2) | 106.4868237 (0.6) | 105.86 (0.2) | 107.6 | |||||||||
| Proper motion (declination) | [mas/yr] | -2.098210858 (0.2) | -1.744422218 (0.7) | -2.098 (0.2) | -0.6 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | WDMS | WDMS | WDMS | WDMS | ||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 19.25 (0.03) | 19.20 | 19.25 (0.03) | 19.20 (0.04) | 19.20 | 19.19 (0.03) | ||||||||
| g magnitude | 18.77 (0.009) | 18.73 | 18.77 (0.009) | 18.73 (0.03) | 18.74 | 18.73 (0.03) | ||||||||
| r magnitude | 18.69 (0.01) | 18.75 | 18.69 (0.01) | 18.75 (0.02) | 18.75 | 18.74 (0.02) | ||||||||
| i magnitude | 18.40 (0.01) | 18.37 | 18.40 (0.01) | 18.37 (0.02) | 18.37 | 18.37 (0.02) | ||||||||
| z magnitude | 17.46 (0.01) | 18.03 | 17.46 (0.01) | 18.03 (0.03) | 18.03 | 18.01 (0.03) | ||||||||
| G magnitude | 18.74 (0.03) | 18.77 | 18.74 | 18.74 (0.004) | ||||||||||
| BP magnitude | 18.77 (0.03) | 18.76 | ||||||||||||
| RP magnitude | 17.93 (0.04) | 17.95 | ||||||||||||
| Pan g magnitude | ||||||||||||||
| Pan r magnitude | ||||||||||||||
| Pan i magnitude | ||||||||||||||
| Pan z magnitude | ||||||||||||||
| Pan y magnitude | ||||||||||||||
| E(B-V) | 0.020 | |||||||||||||
* 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.