All names: GALEX J083056.1+315942, SDSS J083056.11+315941.9, SDSS J083056.12+315941.9, SDSS J083056.12+315942.0, WD 0827+321, 2MASS J08305611+3159420, Gaia DR2 710523380444586496, SDSS J083056.13+315942.0, Gaia EDR3 710523380444586496, LAMOST J083056.11+315941.9, Gaia DR3 710523380444586496, [HHD2009] SDSS J0830+3159, WIRED J083056.11+315941.9, TIC 172842355
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Guo et al. 2015 | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 30 56.12 (0.2) | 08 30 56.12 | 08 30 56.12 (0.2) | 08 30 56.11 | 08 30 56.12 (0.2) | 08 30 56.12 | 08 30 56.04 | 08 30 56.12 | ||||||
| Declination | 31 59 41.81 (0.1) | 31 59 41.99 | 31 59 41.81 (0.2) | 31 59 41.89 | 31 59 41.94 (0.1) | 31 59 41.94 | 31 59 40.20 | 31 59 41.93 | ||||||
| Spectral type | DA+M | DA+M | DA+M | DA | DA+dMe | DA+M | DA dM | DA+M | ||||||
| Effective temperature | [K] | 30360.0 (797) | 30419.0 (727) | 30020.0 (870) | 6640.0 (75) | 6314.0 (20) | ||||||||
| log(g) | [cgs] | 7.69 (0.2) | 7.90 (0.2) | 7.99 (0.2) | 7.76 (0.2) | 5.24 (0.2) | ||||||||
| Mass | [M☉] | 0.5 (0.08) | 0.59 (0.09) | 0.64 (0.1) | ||||||||||
| log(Luminosity) | [L☉] | -0.67 (0.1) | ||||||||||||
| Cooling age | [Gyr] | 0.0076 (0.002) | 0.0129 | |||||||||||
| 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] | 1.14 (0.2) | 1.21 (0.3) | 1.14 (0.2) | ||||||||||
| Distance | [pc] | 879.46 (159) | 824.80 (170) | 803.00 (245) | 879.43 (159) | |||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.901200636 (0.2) | 1.962736607 (0.4) | 1.901 (0.2) | 1.6 | |||||||||
| Proper motion (declination) | [mas/yr] | -8.07109484 (0.2) | -8.468709206 (0.3) | -8.071 (0.2) | -8.0 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | WDMS | WDMS | WDMS | |||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 16.34 (0.1) | |||||||||||||
| H magnitude | 16.07 (0.2) | |||||||||||||
| K magnitude | 16.65 (0.1) | |||||||||||||
| u magnitude | 19.06 (0.02) | 19.08 | 19.06 (0.02) | 19.08 (0.02) | 19.08 | 19.05 (0.02) | ||||||||
| g magnitude | 19.11 (0.01) | 19.17 | 19.11 (0.01) | 19.16 (0.03) | 19.17 | 19.14 (0.02) | ||||||||
| r magnitude | 18.96 (0.01) | 18.97 | 18.95 (0.01) | 18.97 (0.02) | 18.97 | 18.95 (0.02) | ||||||||
| i magnitude | 18.30 (0.009) | 18.32 | 18.30 (0.009) | 18.32 (0.01) | 18.32 | 18.30 (0.01) | ||||||||
| z magnitude | 17.77 (0.02) | 17.81 | 17.80 (0.01) | 17.81 (0.02) | 17.81 | 17.78 (0.02) | ||||||||
| G magnitude | 18.63 (0.04) | 18.65 | 18.63 (0.004) | |||||||||||
| BP magnitude | 19.08 (0.04) | 19.15 | ||||||||||||
| RP magnitude | 17.88 (0.02) | 17.92 | ||||||||||||
| Pan g magnitude | 19.10 (0.008) | |||||||||||||
| Pan r magnitude | 18.97 (0.007) | |||||||||||||
| Pan i magnitude | 18.33 (0.004) | |||||||||||||
| Pan z magnitude | 17.90 (0.007) | |||||||||||||
| Pan y magnitude | 17.69 (0.009) | |||||||||||||
| E(B-V) | 0.026 | |||||||||||||
* 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.