All names: SDSS J080751.83+443030.4, Gaia EDR3 928937104695326208, Gaia DR2 928937104695326208, SDSS J080751.84+443030.4, GALEX J080751.8+443030, SDSS J080751.84+443030.5, WD 0804+446.1, Gaia DR3 928937104695326208
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | MWDD H | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 07 51.84 (0.5) | 08 07 51.84 | 08 07 51.84 (0.7) | 08 07 51.84 (0.5) | 08 07 51.84 | 08 07 50.86 | 08 07 51.84 | 08 07 51.84 | ||||||
| Declination | 44 30 30.37 (0.4) | 44 30 30.46 | 44 30 30.37 (0.6) | 44 30 30.43 (0.4) | 44 30 30.48 | 44 30 28.08 | 44 30 30.47 | 44 30 30.46 | ||||||
| Spectral type | DA | DA | DA | DA | DA1.4 | DA | DA | |||||||
| Effective temperature | [K] | 35402.0 (1707) | 25217.0 | 36977.0 (1221) | 36390.0 (1314) | 37251.0 (1266) | ||||||||
| log(g) | [cgs] | 7.87 (0.3) | 8.89 | 7.87 (0.2) | 7.76 (0.2) | 7.90 (0.2) | ||||||||
| Mass | [M☉] | 0.59 (0.1) | 1.155 | 0.552 (0.09) | ||||||||||
| log(Luminosity) | [L☉] | -0.51 (0.2) | ||||||||||||
| Cooling age | [Gyr] | 0.0052 (0.001) | 0.2059 | |||||||||||
| 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] | 1.67 (0.6) | 2.53 (1) | 1.67 (0.6) | ||||||||||
| Distance | [pc] | 597.78 (213) | 395.59 (153) | 597.76 (213) | ||||||||||
| Composition | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.671949296 (0.6) | 2.710633389 (1) | 1.672 (0.6) | -3.0 | -4.0 | ||||||||
| Proper motion (declination) | [mas/yr] | -4.19914959 (0.5) | -4.496380592 (1) | -4.199 (0.5) | -2.7 | 0.0 | ||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 19.50 (0.03) | 19.50 (0.03) | 19.52 (0.03) | 19.50 | 19.52 (0.03) | 19.50 (0.03) | ||||||||
| g magnitude | 19.80 (0.01) | 19.80 (0.01) | 19.82 (0.02) | 19.82 | 19.82 (0.02) | 19.82 (0.02) | ||||||||
| r magnitude | 20.26 (0.03) | 20.26 (0.03) | 20.29 (0.03) | 20.29 | 20.28 (0.03) | 20.29 (0.03) | ||||||||
| i magnitude | 20.58 (0.04) | 20.58 (0.04) | 20.61 (0.04) | 20.60 | 20.61 (0.04) | 20.60 (0.04) | ||||||||
| z magnitude | 20.65 (0.2) | 20.65 (0.2) | 20.68 (0.2) | 20.69 | 20.67 (0.2) | 20.69 (0.2) | ||||||||
| G magnitude | 20.08 (0.06) | 20.15 | 20.08 (0.007) | |||||||||||
| BP magnitude | 20.13 (0.06) | 20.11 | ||||||||||||
| RP magnitude | 20.13 (0.1) | 20.25 | ||||||||||||
| Pan g magnitude | 19.84 (0.02) | |||||||||||||
| Pan r magnitude | 20.33 (0.03) | |||||||||||||
| Pan i magnitude | 20.63 (0.03) | |||||||||||||
| Pan z magnitude | 20.81 (0.2) | |||||||||||||
| Pan y magnitude | ||||||||||||||
| E(B-V) | 0.038 | |||||||||||||
* 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.