All names: SDSS J080708.48+194950.6, Gaia DR2 669750259471847680, J0807+1949, Gaia EDR3 669750259471847680, Gaia DR3 669750259471847680, SDSS J080708.48+194950.7, GALEX J080708.5+194950, SDSS J080708.49+194949.9, SDSS J080708.48+194950.2
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Coutu et al. 2019 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 07 08.49 (0.2) | 08 07 08.48 | 08 07 08.48 | 08 07 08.49 (0.3) | 08 07 08.49 | 08 07 08.48 (0.2) | 08 07 08.48 | ||||
| Declination | 19 49 49.29 (0.2) | 19 49 50.23 | 19 49 50.23 | 19 49 49.35 (0.2) | 19 49 49.29 | 19 49 51.24 (0.2) | 19 49 50.71 | ||||
| Spectral type | DQA | DQ | DQ | DQ_CI | hotDQ | ||||||
| Effective temperature | [K] | 13501.0 (682) | 12775.0 (871) | 13508.0 (199) | |||||||
| log(g) | [cgs] | 8.78 | 8.75 (0.09) | 9.96 (0.05) | |||||||
| Mass | [M☉] | 1.0799 | 1.063 (0.06) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 1.0800 | |||||||||
| log(H/He) | -3 | ||||||||||
| log(C/He) | -1.2364 (0.1) | ||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(N/He) | |||||||||||
| log(O/He) | |||||||||||
| log(Na/He) | |||||||||||
| log(Mg/He) | |||||||||||
| log(Al/He) | |||||||||||
| log(Si/He) | |||||||||||
| log(P/He) | |||||||||||
| log(S/He) | |||||||||||
| log(Cl/He) | |||||||||||
| log(Sc/He) | |||||||||||
| log(Ti/He) | |||||||||||
| log(V/He) | |||||||||||
| log(Cr/He) | |||||||||||
| log(Mn/He) | |||||||||||
| log(Fe/He) | |||||||||||
| log(Co/He) | |||||||||||
| log(Ni/He) | |||||||||||
| log(Cu/He) | |||||||||||
| log(Zn/He) | |||||||||||
| log(Ga/He) | |||||||||||
| log(Ge/He) | |||||||||||
| log(Sr/He) | |||||||||||
| Parallax | [mas] | 5.84 (0.3) | 5.66 | 5.66 (0.3) | 5.84 | 5.84 (0.3) | |||||
| Distance | [pc] | 171.32 (8) | 176.59 (10) | 176.59 (10) | 171.32 | 171.32 (8) | |||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 6.760307264 (0.3) | 5.941206809 (0.6) | 6.76 (0.3) | |||||||
| Proper motion (declination) | [mas/yr] | -121.8963046 (0.2) | -121.8775953 (0.4) | -121.896 (0.2) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 18.75 (0.02) | 18.75 (0.02) | 18.73 (0.03) | ||||||||
| g magnitude | 18.83 (0.009) | 18.83 (0.009) | 18.86 (0.02) | ||||||||
| r magnitude | 19.16 (0.01) | 19.16 (0.01) | 19.14 (0.02) | ||||||||
| i magnitude | 19.37 (0.02) | 19.37 (0.02) | 19.40 (0.02) | ||||||||
| z magnitude | 19.68 (0.08) | 19.68 (0.08) | 19.72 (0.06) | ||||||||
| G magnitude | 18.98 (0.04) | 19.03 | 18.98 | 18.98 (0.004) | |||||||
| BP magnitude | 18.88 (0.04) | 18.86 | |||||||||
| RP magnitude | 19.11 (0.05) | 18.99 | |||||||||
| Pan g magnitude | 18.89 (0.005) | ||||||||||
| Pan r magnitude | 19.15 (0.01) | ||||||||||
| Pan i magnitude | 19.41 (0.008) | ||||||||||
| Pan z magnitude | 19.65 (0.02) | ||||||||||
| Pan y magnitude | 19.83 (0.07) | ||||||||||
| E(B-V) | 0.007 | ||||||||||
* 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.