All names: SDSS J220705.42-002109.7, [HHD2009] SDSS J2207-0021, Gaia EDR3 2677374654028779776, WD 2204-005, SDSS J220705.42-002109.6, GALEX J220705.4-002109, WIRED J220705.42-002109.6, Gaia DR2 2677374654028779776, LAMOST J220705.42-002109.6, 2SLAQ J220705.41-002109.7, Gaia DR3 2677374654028779776, [SGR2010] J2207-0021
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 07 05.43 (0.3) | 22 07 05.42 | 22 07 05.43 (0.4) | 22 07 05.42 | 22 07 05.43 (0.3) | 22 07 05.42 | 22 07 05.04 | 22 07 05.42 | |||
| Declination | -00 21 09.79 (0.3) | -00 21 09.74 | -00 21 09.78 (0.5) | -00 21 09.61 | -00 21 09.62 (0.3) | -00 21 09.67 | -00 21 07.56 | -00 21 09.68 | |||
| Spectral type | DA+M | DA+M | DA+M | DA dM | DA+M | ||||||
| Effective temperature | [K] | 12536.0 (3056) | 8481.0 (124) | 8124.0 (134) | |||||||
| log(g) | [cgs] | 7.62 (0.6) | 7.86 (0.2) | 7.35 (0.2) | |||||||
| Mass | [M☉] | 0.41 (0.3) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.13 (0.4) | 3.40 (0.6) | 2.13 (0.4) | |||||||
| Distance | [pc] | 469.10 (81) | 294.14 (49) | 864.00 (204) | 469.11 (81) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 3.893398459 (0.4) | 3.989067063 (0.8) | 3.893 (0.4) | -1.5 | ||||||
| Proper motion (declination) | [mas/yr] | -10.51666388 (0.4) | -11.90090665 (0.9) | -10.517 (0.4) | -9.6 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 17.07 (0.02) | ||||||||||
| H magnitude | 16.55 (0.03) | ||||||||||
| K magnitude | 16.21 (0.04) | ||||||||||
| u magnitude | 20.20 (0.04) | 20.11 | 20.20 (0.04) | 20.11 (0.05) | 20.11 | 20.12 (0.05) | |||||
| g magnitude | 19.77 (0.01) | 19.76 | 19.77 (0.01) | 19.76 (0.02) | 19.76 | 19.77 (0.02) | |||||
| r magnitude | 19.68 (0.02) | 19.63 | 19.69 (0.02) | 19.63 (0.02) | 19.63 | 19.63 (0.02) | |||||
| i magnitude | 19.05 (0.01) | 19.07 | 19.06 (0.01) | 19.07 (0.02) | 19.07 | 19.07 (0.02) | |||||
| z magnitude | 18.47 (0.03) | 18.49 | 18.48 (0.03) | 18.49 (0.04) | 18.49 | 18.47 (0.04) | |||||
| G magnitude | 19.33 (0.08) | 19.36 | 19.33 (0.005) | ||||||||
| BP magnitude | 19.68 (0.08) | 19.65 | |||||||||
| RP magnitude | 18.58 (0.03) | 18.54 | |||||||||
| Pan g magnitude | 19.77 (0.01) | ||||||||||
| Pan r magnitude | 19.69 (0.01) | ||||||||||
| Pan i magnitude | 19.06 (0.005) | ||||||||||
| Pan z magnitude | 18.56 (0.01) | ||||||||||
| Pan y magnitude | 18.29 (0.04) | ||||||||||
| E(B-V) | 0.106 | ||||||||||
* 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.