All names: Gaia DR3 1095589154404278400, SDSS J074023.82+653418.7, SDSS J074023.82+653418.6, Gaia EDR3 1095589154404278400, Gaia DR2 1095589154404278400, SDSS J074023.83+653418.7, GALEX J074023.8+653418, [CGC97] J0740.4+6534
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 40 23.83 (0.1) | 07 40 23.83 | 07 40 23.83 (0.2) | 07 40 23.84 (0.1) | 07 40 23.83 | ||||
| Declination | 65 34 18.62 (0.2) | 65 34 18.70 | 65 34 18.62 (0.3) | 65 34 18.70 (0.2) | 65 34 18.71 | ||||
| Spectral type | DA | DA | DA | ||||||
| Effective temperature | [K] | 60069.0 (3530) | 59294.0 (2302) | ||||||
| log(g) | [cgs] | 7.57 (0.2) | 7.78 (0.1) | ||||||
| Mass | [M☉] | 0.54 (0.07) | 0.609 (0.05) | ||||||
| log(Luminosity) | [L☉] | 0.67 (0.2) | |||||||
| Cooling age | [Gyr] | 0.0007 (0.0005) | |||||||
| 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] | 0.68 (0.2) | 0.44 (0.3) | 0.68 (0.2) | |||||
| Distance | [pc] | 1464.81 (526) | 2278.96 (1632) | 1464.77 (525) | |||||
| Composition | H | ||||||||
| Proper motion (right ascension) | [mas/yr] | -2.690907278 (0.1) | -2.123110529 (0.3) | -2.691 (0.1) | |||||
| Proper motion (declination) | [mas/yr] | -5.128937856 (0.3) | -4.506672838 (0.6) | -5.129 (0.3) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 18.68 (0.02) | 18.68 (0.02) | 18.68 (0.02) | ||||||
| g magnitude | 19.05 (0.009) | 19.05 (0.009) | 19.06 (0.01) | ||||||
| r magnitude | 19.57 (0.02) | 19.57 (0.01) | 19.57 (0.02) | ||||||
| i magnitude | 19.89 (0.02) | 19.89 (0.03) | 19.90 (0.03) | ||||||
| z magnitude | 20.33 (0.1) | 20.33 (0.1) | 20.30 (0.1) | ||||||
| G magnitude | 19.32 (0.02) | 19.38 | 19.32 (0.004) | ||||||
| BP magnitude | 19.19 (0.02) | 19.13 | |||||||
| RP magnitude | 19.55 (0.05) | 19.54 | |||||||
| Pan g magnitude | 19.14 (0.009) | ||||||||
| Pan r magnitude | 19.55 (0.01) | ||||||||
| Pan i magnitude | 19.95 (0.02) | ||||||||
| Pan z magnitude | 20.25 (0.05) | ||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.046 | ||||||||
* 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.