All names: SDSS J073031.42+373018.4, Gaia EDR3 898904086317925760, [HHD2009] SDSS J0730+3730, Gaia DR2 898904082020923136, WIRED J073031.42+373018.4, WD 0727+376, Gaia DR3 898904086317925760, SDSS J073031.42+373018.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 30 31.44 (0.5) | 07 30 31.42 | 07 30 31.42 | 07 30 31.44 (0.5) | 07 30 31.43 | 07 30 31.30 | 07 30 31.42 | |||
| Declination | 37 30 18.46 (0.5) | 37 30 18.48 | 37 30 18.40 | 37 30 18.43 (0.5) | 37 30 18.49 | 37 30 11.16 | 37 30 18.44 | |||
| Spectral type | DA+M | DA+dMe | DA+M | DA+M | DAHM | |||||
| Effective temperature | [K] | 25891.0 (2286) | 6301.0 (3) | 6300.0 (2) | ||||||
| log(g) | [cgs] | 7.83 (0.4) | 7.26 (0.3) | 6.31 (0.3) | ||||||
| Mass | [M☉] | 0.55 (0.2) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 0.29 (0.6) | 0.29 (0.6) | |||||||
| Distance | [pc] | 3453.35 (7713) | 158.00 (12) | 3453.04 (7711) | ||||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -0.28039874 (0.5) | -0.28 (0.5) | 1.7 | ||||||
| Proper motion (declination) | [mas/yr] | 1.574508654 (0.5) | 1.575 (0.5) | -2.2 | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | WDMS | yes | |||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 20.29 (0.05) | 20.32 | 20.32 (0.05) | 20.32 (0.05) | 20.32 | 20.32 (0.05) | ||||
| g magnitude | 20.12 (0.02) | 20.18 | 20.18 (0.03) | 20.18 (0.03) | 20.18 | 20.18 (0.03) | ||||
| r magnitude | 19.78 (0.02) | 19.82 | 19.79 (0.02) | 19.82 (0.02) | 19.82 | 19.81 (0.02) | ||||
| i magnitude | 18.96 (0.01) | 19.02 | 18.98 (0.02) | 19.02 (0.02) | 19.01 | 19.02 (0.02) | ||||
| z magnitude | 18.43 (0.03) | 18.46 | 18.46 (0.03) | 18.46 (0.03) | 18.46 | 18.47 (0.03) | ||||
| G magnitude | 19.71 (0.07) | 19.71 (0.01) | ||||||||
| BP magnitude | 20.01 (0.07) | |||||||||
| RP magnitude | 18.54 (0.02) | |||||||||
| Pan g magnitude | 20.08 (0.02) | |||||||||
| Pan r magnitude | 19.80 (0.01) | |||||||||
| Pan i magnitude | 19.04 (0.009) | |||||||||
| Pan z magnitude | 18.59 (0.02) | |||||||||
| Pan y magnitude | 18.31 (0.02) | |||||||||
| E(B-V) | 0.036 | |||||||||
* 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.