All names: SDSS J074456.21+164041.8, J0744+1640, SDSS J074456.22+164041.8, Gaia EDR3 667952729758500224, SDSS J074456.22+164042.2, Gaia DR2 667952729758500224, Gaia DR3 667952729758500224
| Parameter | Unit | Gaia EDR3 | SDSS DR14 | Blouin 2020 | Coutu et al. 2019 | Gaia DR2 | Hollands et al. 2017 | Stilism | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 44 56.23 (0.8) | 07 44 56.22 | 07 44 56.22 | 07 44 56.23 (1) | 07 44 56.21 (0.8) | ||||
| Declination | 16 40 40.80 (0.7) | 16 40 41.85 | 16 40 41.85 | 16 40 40.86 (0.9) | 16 40 42.73 (0.7) | ||||
| Spectral type | DZ | DZ | DZ | DZ | |||||
| Effective temperature | [K] | 4703.0 (160) | 4943.0 (85) | 4940.0 (190) | |||||
| log(g) | [cgs] | 7.91 (0.2) | 8.11 | ||||||
| Mass | [M☉] | 0.515 (0.2) | 0.6355 | ||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | 6.4300 | 6.6000 | ||||||
| log(H/He) | <-3.0 | ||||||||
| log(C/He) | |||||||||
| log(Ca/He) | -10.3 (0.3) | -9.8754 (0.3) | -10.24 | ||||||
| log(Ca/H) | |||||||||
| log(N/He) | |||||||||
| log(O/He) | |||||||||
| log(Na/He) | |||||||||
| log(Mg/He) | -9.1 (0.5) | -8.63 | |||||||
| 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) | -9.1 (0.5) | -9.33 | |||||||
| log(Co/He) | |||||||||
| log(Ni/He) | |||||||||
| log(Cu/He) | |||||||||
| log(Zn/He) | |||||||||
| log(Ga/He) | |||||||||
| log(Ge/He) | |||||||||
| log(Sr/He) | |||||||||
| Parallax | [mas] | 8.04 (1) | 8.44 | 8.44 (1) | 8.04 (1) | ||||
| Distance | [pc] | 124.38 (18) | 122.55 (20) | 118.46 (17) | 118.46 (17) | 118.00 (15) | 124.38 (18) | ||
| Composition | He | He | He | ||||||
| Proper motion (right ascension) | [mas/yr] | 12.47284469 (1) | 11.56113366 (2) | 12.473 (1) | |||||
| Proper motion (declination) | [mas/yr] | -120.8649889 (0.9) | -119.7025479 (2) | -120.865 (0.9) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 24.94 (0.8) | 24.64 (0.9) | 24.64 (0.9) | 24.94 (0.9) | |||||
| g magnitude | 20.89 (0.03) | 20.88 (0.03) | 20.88 (0.03) | 20.89 (0.03) | |||||
| r magnitude | 20.20 (0.02) | 20.18 (0.02) | 20.18 (0.02) | 20.19 (0.02) | |||||
| i magnitude | 20.05 (0.03) | 20.03 (0.02) | 20.03 (0.02) | 20.05 (0.03) | |||||
| z magnitude | 20.07 (0.08) | 20.07 (0.08) | 20.07 (0.08) | 20.07 (0.08) | |||||
| G magnitude | 20.27 (0.1) | 20.34 | 20.27 (0.009) | ||||||
| BP magnitude | 20.45 (0.1) | 20.99 | |||||||
| RP magnitude | 19.77 (0.09) | 19.81 | |||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.004 | ||||||||
* 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.