SDSS J081737.95+041906.4
All names: SDSS J081737.95+041906.4, WD 0815+044, Gaia DR3 3093133569955786368, Gaia DR2 3093133569955786368, Gaia EDR3 3093133569955786368, SDSS J081737.96+041906.4, GALEX J081737.9+041906
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Tremblay et al. 2011 | Vincent et al. 2024 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 17 37.88 (0.09) | 08 17 37.95 | 08 17 37.89 (0.1) | 08 17 37.88 | 08 17 37.97 (0.09) | 08 17 37.96 | 08 17 37.99 | 08 17 37.96 | ||||||
| Declination | 04 19 05.98 (0.07) | 04 19 06.45 | 04 19 06.00 (0.09) | 04 19 05.98 | 04 19 06.52 (0.07) | 04 19 06.44 | 04 19 02.28 | 04 19 06.44 | ||||||
| Spectral type | DA | DA | DA | DA | DA_auto | DA | DA | DA | ||||||
| Effective temperature | [K] | 9073.0 | 9240.0 (40) | 9228.0 (169) | 9221.0 (32) | 9106.0 (33) | ||||||||
| log(g) | [cgs] | 7.95 | 8.22 (0.05) | 8.00 (0.03) | 8.29 (0.05) | 8.15 (0.05) | ||||||||
| Mass | [M☉] | 0.57 | 0.73 (0.03) | 0.597 (0.03) | 0.684 (0.03) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 0.7271 | 1.0233 | |||||||||||
| 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] | 9.20 (0.1) | 9.25 (0.2) | 9.20 | 9.20 (0.1) | |||||||||
| Distance | [pc] | 108.71 (1) | 108.06 (2) | 108.71 | 108.71 (1) | |||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -78.53483132 (0.1) | -78.58442003 (0.2) | -78.535 (0.1) | ||||||||||
| Proper motion (declination) | [mas/yr] | -33.87067668 (0.08) | -33.99004509 (0.2) | -33.871 (0.08) | ||||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 18.07 (0.01) | 18.07 (0.01) | 18.07 (0.02) | 18.06 | 18.06 (0.02) | |||||||||
| g magnitude | 17.62 (0.005) | 17.62 (0.005) | 17.66 (0.01) | 17.65 | 17.65 (0.01) | |||||||||
| r magnitude | 17.67 (0.006) | 17.67 (0.006) | 17.68 (0.01) | 17.68 | 17.67 (0.01) | |||||||||
| i magnitude | 17.75 (0.008) | 17.75 (0.008) | 17.76 (0.01) | 17.76 | 17.75 (0.01) | |||||||||
| z magnitude | 17.89 (0.02) | 17.89 (0.02) | 17.88 (0.02) | 17.88 | 17.89 (0.02) | |||||||||
| G magnitude | 17.61 (0.01) | 17.63 | 17.61 | 17.61 (0.003) | ||||||||||
| BP magnitude | 17.71 (0.01) | 17.70 | ||||||||||||
| RP magnitude | 17.48 (0.02) | 17.47 | ||||||||||||
| Pan g magnitude | 17.64 (0.004) | |||||||||||||
| Pan r magnitude | 17.67 (0.004) | |||||||||||||
| Pan i magnitude | 17.78 (0.003) | |||||||||||||
| Pan z magnitude | 17.90 (0.006) | |||||||||||||
| Pan y magnitude | 17.98 (0.009) | |||||||||||||
| E(B-V) | 0.004 | |||||||||||||
* Constant surface field
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