All names: GALEX J220714.4+072232, SDSS J220714.41+072232.1, WD 2204+071, UCAC4 487-135054, PG 2204+071, BPS BS 17569-0063, SDSS J220714.41+072232.18, 1SWASP J220714.40+072232.3, WD2204+071, Gaia DR2 2721869312624463872, 2MASS J22071441+0722323, SDSS J220714.41+072232.0, UCAC2 34383676
| Parameter | Unit | Simbad | Gaia DR2 | Kepler et al. 2015 | Koester et al. 2009 | Liebert et al. 2005 | Koester et al. 2001 | SDSS DR10 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 07 14.41 (0.08) | 22 07 14.42 (0.08) | 22 07 16.20 | 22 07 14.42 | 22 07 13.73 | ||||
| Declination | 07 22 32.15 (0.07) | 07 22 32.07 (0.07) | 07 18 36.00 | 07 22 32.09 | 07 22 16.68 | ||||
| Spectral type | sdB | sdOB_known | DA | sd | |||||
| Effective temperature | [K] | 31576.0 (1000) | 24454.0 (39) | 24790.0 (383) | 24557.0 (87) | ||||
| log(g) | [cgs] | 6.50 (0.05) | 7.95 (0.005) | 7.95 (0.05) | 7.86 (0.01) | ||||
| Mass | [M☉] | 0.61 (0.03) | 0.56 | ||||||
| log(Luminosity) | [L☉] | -1.19 | |||||||
| Cooling age | [Gyr] | 0.0295 | |||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.56 (0.09) | 0.56 (0.09) | ||||||
| Distance | [pc] | 1776.51 (271) | 1776.38 (271) | 132.00 | |||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 1.856 (0.1) | 1.855971244 (0.1) | ||||||
| Proper motion (declination) | [mas/yr] | -4.987 (0.1) | -4.986610123 (0.1) | ||||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 14.51 (0.01) | ||||||||
| V magnitude | 14.73 (0.01) | 15.86 | 15.86 | 15.86 | |||||
| R magnitude | 15.15 (0.1) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.30 (0.05) | ||||||||
| H magnitude | 15.25 (0.09) | ||||||||
| K magnitude | |||||||||
| u magnitude | 14.18 (0.004) | 14.18 (0) | 14.18 (0.004) | ||||||
| g magnitude | 14.48 (0.004) | 14.48 (0) | 14.48 (0.004) | ||||||
| r magnitude | 14.90 (0.004) | 14.90 (0) | 14.90 (0.004) | ||||||
| i magnitude | 15.22 (0.005) | 15.22 (0) | 15.22 (0.005) | ||||||
| z magnitude | 15.51 (0.006) | 15.51 (0.01) | 15.51 (0.006) | ||||||
| G magnitude | 14.72 (0.001) | 14.72 | |||||||
| BP magnitude | 14.53 | ||||||||
| RP magnitude | 14.91 | ||||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude |
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour at Université de Montréal. Please send database updates, corrections, suggestions or bug reports to dufourpa@astro.umontreal.ca.