All names: SDSS J234034.61+012416.6, Gaia DR2 2646118355949741440, J2340+0124, Gaia EDR3 2646118355949741440, SDSS J234034.61+012416.5, Gaia DR3 2646118355949741440
| Parameter | Unit | Gaia EDR3 | SDSS DR14 | Blouin 2020 | Coutu et al. 2019 | Gaia DR2 | Hollands et al. 2017 | Stilism | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 40 34.67 (0.3) | 23 40 34.61 | 23 40 34.61 | 23 40 34.66 (0.4) | 23 40 34.55 (0.3) | |||||
| Declination | 01 24 16.99 (0.2) | 01 24 16.59 | 01 24 16.59 | 01 24 16.96 (0.2) | 01 24 16.13 (0.2) | |||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | |||||
| Effective temperature | [K] | 6072.0 (82) | 6167.0 (63) | 6200.0 (100) | ||||||
| log(g) | [cgs] | 8.00 (0.08) | 8.06 | |||||||
| Mass | [M☉] | 0.574 (0.05) | 0.6114 | |||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | 2.5800 | 2.9000 | |||||||
| log(H/He) | <-3.0648 | |||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | -8.8 (0.1) | -8.8357 (0.09) | -8.5 | |||||||
| log(Ca/H) | ||||||||||
| log(N/He) | ||||||||||
| log(O/He) | ||||||||||
| log(Na/He) | ||||||||||
| log(Mg/He) | -7.2 (0.1) | -7.54 | ||||||||
| 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) | -8.0 (0.2) | -7.9 | ||||||||
| log(Co/He) | ||||||||||
| log(Ni/He) | ||||||||||
| log(Cu/He) | ||||||||||
| log(Zn/He) | ||||||||||
| log(Ga/He) | ||||||||||
| log(Ge/He) | ||||||||||
| log(Sr/He) | ||||||||||
| Parallax | [mas] | 8.84 (0.3) | 8.70 | 8.70 (0.4) | 8.84 (0.3) | |||||
| Distance | [pc] | 113.09 (4) | 115.05 (6) | 114.96 (6) | 114.96 (6) | 114.00 (15) | 113.09 (4) | |||
| Composition | He | He | He | |||||||
| Proper motion (right ascension) | [mas/yr] | 105.0104065 (0.3) | 105.7569742 (0.8) | 105.01 (0.3) | ||||||
| Proper motion (declination) | [mas/yr] | 53.64839598 (0.2) | 53.76196166 (0.5) | 53.648 (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 | 21.11 (0.08) | 21.10 (0.08) | 21.10 (0.08) | 21.10 (0.08) | ||||||
| g magnitude | 19.44 (0.01) | 19.40 (0.02) | 19.40 (0.02) | 19.42 (0.01) | ||||||
| r magnitude | 19.09 (0.01) | 19.08 (0.02) | 19.08 (0.02) | 19.08 (0.01) | ||||||
| i magnitude | 19.15 (0.01) | 19.15 (0.02) | 19.15 (0.02) | 19.14 (0.01) | ||||||
| z magnitude | 19.24 (0.04) | 19.20 (0.04) | 19.20 (0.04) | 19.22 (0.04) | ||||||
| G magnitude | 19.17 (0.05) | 19.19 | 19.17 (0.004) | |||||||
| BP magnitude | 19.53 (0.05) | 19.45 | ||||||||
| RP magnitude | 18.96 (0.05) | 18.86 | ||||||||
| Pan g magnitude | ||||||||||
| Pan r magnitude | ||||||||||
| Pan i magnitude | ||||||||||
| Pan z magnitude | ||||||||||
| Pan y magnitude | ||||||||||
| E(B-V) | 0.010 | |||||||||
* 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.