All names: Gaia DR2 1392018829282234112, SDSS J150739.03+403408.9, SDSS J150739.03+403409.0, Gaia EDR3 1392018829282234112, J1507+4034, Gaia DR3 1392018829282234112
| Parameter | Unit | Gaia EDR3 | SDSS DR14 | Blouin 2020 | Coutu et al. 2019 | Hollands et al. 2017 | Stilism | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 07 39.04 (1) | 15 07 39.04 | 15 07 39.04 | 15 07 39.04 (1) | |||||
| Declination | 40 34 08.83 (1) | 40 34 08.97 | 40 34 08.97 | 40 34 08.87 (1) | |||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | ||||
| Effective temperature | [K] | 7304.0 (211) | 7352.0 (290) | 7180.0 (330) | |||||
| log(g) | [cgs] | 8.00 | 8.00 | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | 0.0000 | 1.8000 | ||||||
| log(H/He) | <-4.0722 | ||||||||
| log(C/He) | |||||||||
| log(Ca/He) | -8.0 (0.2) | -7.9733 (0.2) | -8.18 | ||||||
| log(Ca/H) | |||||||||
| log(N/He) | |||||||||
| log(O/He) | |||||||||
| log(Na/He) | |||||||||
| log(Mg/He) | -6.3 (0.1) | -6.57 | |||||||
| 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) | -6.8 (0.2) | -7.17 | |||||||
| log(Co/He) | |||||||||
| log(Ni/He) | |||||||||
| log(Cu/He) | |||||||||
| log(Zn/He) | |||||||||
| log(Ga/He) | |||||||||
| log(Ge/He) | |||||||||
| log(Sr/He) | |||||||||
| Parallax | [mas] | 3.38 (2) | 3.38 (2) | ||||||
| Distance | [pc] | 295.55 (134) | 371.29 (26) | 338.00 (46) | 295.54 (134) | ||||
| Composition | He | He | He | ||||||
| Proper motion (right ascension) | [mas/yr] | -2.508933575 (2) | -2.509 (2) | ||||||
| Proper motion (declination) | [mas/yr] | -2.441959681 (2) | -2.442 (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 | 22.29 (0.2) | 22.15 (0.2) | 22.15 (0.2) | 22.15 (0.3) | |||||
| g magnitude | 21.07 (0.04) | 21.08 (0.04) | 21.08 (0.04) | 21.08 (0.05) | |||||
| r magnitude | 20.89 (0.04) | 20.94 (0.05) | 20.94 (0.05) | 20.90 (0.05) | |||||
| i magnitude | 21.04 (0.09) | 21.08 (0.09) | 21.08 (0.09) | 21.02 (0.1) | |||||
| z magnitude | 21.35 (0.4) | 21.43 (0.4) | 21.43 (0.4) | 21.37 (0.4) | |||||
| G magnitude | 20.91 (0.2) | 20.91 (0.02) | |||||||
| BP magnitude | 21.22 (0.2) | ||||||||
| RP magnitude | 20.37 (0.2) | ||||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.023 | ||||||||
* 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.