All names: Gaia EDR3 675975178912274944, SDSS J081557.49+210657.2, SDSS J081557.60+210657.2, TIC 82349149, 2MASS J08155746+2106569, Gaia DR3 675975178912274944, WD 0813+212, SDSS J081557.49+210657.1, Gaia DR2 675975178912274944, SDSS J081557.48+210657.1, [HHD2009] SDSS J0815+2106
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 15 57.48 (0.3) | 08 15 57.49 | 08 15 57.48 (0.4) | 08 15 57.48 | 08 15 57.49 (0.3) | 08 15 57.31 | 08 15 57.49 | |||
| Declination | 21 06 57.06 (0.2) | 21 06 57.17 | 21 06 57.07 (0.2) | 21 06 57.10 | 21 06 57.26 (0.2) | 21 06 51.12 | 21 06 57.18 | |||
| Spectral type | DA+M | DA+M | DA d | DA+M | ||||||
| Effective temperature | [K] | 22037.0 (2295) | 6303.0 (7) | |||||||
| log(g) | [cgs] | 7.33 (0.4) | 6.79 (0.3) | |||||||
| Mass | [M☉] | 0.35 (0.1) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 1.85 (0.3) | 1.40 (0.4) | 1.85 (0.3) | ||||||
| Distance | [pc] | 540.10 (86) | 712.77 (224) | 520.00 (64) | 540.10 (86) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -6.557561715 (0.3) | -6.83222912 (0.7) | -6.558 (0.3) | ||||||
| Proper motion (declination) | [mas/yr] | -11.97460568 (0.2) | -11.70158714 (0.5) | -11.975 (0.2) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | WDMS | ||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 16.84 (0.01) | |||||||||
| H magnitude | 16.44 (0.2) | |||||||||
| K magnitude | ||||||||||
| u magnitude | 19.77 (0.03) | 19.85 | 19.82 (0.04) | 19.86 | 19.82 (0.04) | |||||
| g magnitude | 19.71 (0.01) | 19.72 | 19.71 (0.01) | 19.72 | 19.72 (0.02) | |||||
| r magnitude | 19.67 (0.02) | 19.68 | 19.67 (0.02) | 19.67 | 19.67 (0.02) | |||||
| i magnitude | 18.88 (0.01) | 18.89 | 18.87 (0.01) | 18.89 | 18.91 (0.02) | |||||
| z magnitude | 18.29 (0.02) | 18.29 | 18.29 (0.02) | 18.29 | 18.30 (0.03) | |||||
| G magnitude | 19.29 (0.04) | 19.31 | 19.29 (0.004) | |||||||
| BP magnitude | 19.78 (0.04) | 19.70 | ||||||||
| RP magnitude | 18.47 (0.02) | 18.45 | ||||||||
| Pan g magnitude | 19.72 (0.02) | |||||||||
| Pan r magnitude | 19.69 (0.01) | |||||||||
| Pan i magnitude | 18.94 (0.007) | |||||||||
| Pan z magnitude | 18.41 (0.009) | |||||||||
| Pan y magnitude | 18.11 (0.007) | |||||||||
| E(B-V) | 0.031 | |||||||||
* 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.