All names: Gaia DR2 814515018401000064, Gaia EDR3 814515018401000064, J0929+4247, SDSS J092932.50+424757.8, SDSS J092932.50+424757.92, SDSS J092932.49+424757.9, Gaia DR3 814515018401000064, SDSS J092932.50+424757.9, SDSS J092932.49+424757.8
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Blouin 2020 | Coutu et al. 2019 | Gaia DR2 | Hollands et al. 2017 | Stilism | Kepler et al. 2015 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 29 32.51 (0.3) | 09 29 32.50 | 09 29 32.50 | 09 29 32.51 (0.4) | 09 29 32.50 (0.3) | |||||||
| Declination | 42 47 57.57 (0.2) | 42 47 57.90 | 42 47 57.91 | 42 47 57.58 (0.4) | 42 47 57.85 (0.2) | |||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | ||||||
| Effective temperature | [K] | 6676.0 (104) | 6683.0 (88) | 6530.0 (160) | 7518.0 (660) | |||||||
| log(g) | [cgs] | 7.85 (0.2) | 7.86 | 8.00 (0) | ||||||||
| Mass | [M☉] | 0.489 (0.1) | 0.4957 | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 1.4800 | 2.4000 | |||||||||
| log(H/He) | <-3.7248 | |||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | -8.3 (0.2) | -8.2649 (0.2) | -8.46 | -7.649 (0.07) | ||||||||
| log(Ca/H) | ||||||||||||
| log(N/He) | ||||||||||||
| log(O/He) | ||||||||||||
| log(Na/He) | -8.64 | |||||||||||
| log(Mg/He) | -6.5 (0.2) | -6.85 | ||||||||||
| 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) | -9.01 | |||||||||||
| log(Mn/He) | ||||||||||||
| log(Fe/He) | -7.1 (0.2) | -7.15 | ||||||||||
| log(Co/He) | ||||||||||||
| log(Ni/He) | ||||||||||||
| log(Cu/He) | ||||||||||||
| log(Zn/He) | ||||||||||||
| log(Ga/He) | ||||||||||||
| log(Ge/He) | ||||||||||||
| log(Sr/He) | ||||||||||||
| Parallax | [mas] | 4.90 (0.4) | 4.59 | 4.59 (0.6) | 4.90 (0.4) | |||||||
| Distance | [pc] | 203.89 (18) | 221.83 (33) | 217.68 (29) | 217.68 (29) | 185.00 (25) | 203.89 (18) | |||||
| Composition | He | He | He | He | ||||||||
| Proper motion (right ascension) | [mas/yr] | 9.106675993 (0.4) | 9.056687202 (0.9) | 9.107 (0.4) | ||||||||
| Proper motion (declination) | [mas/yr] | -17.71461737 (0.3) | -16.8569232 (0.9) | -17.715 (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 | 21.64 (0.09) | 21.62 (0.08) | 21.62 (0.08) | 21.64 (0.09) | 21.64 (0.09) | |||||||
| g magnitude | 20.18 (0.02) | 20.18 (0.03) | 20.18 (0.03) | 20.18 (0.02) | 20.18 (0.02) | |||||||
| r magnitude | 19.92 (0.02) | 19.91 (0.02) | 19.91 (0.02) | 19.92 (0.02) | 19.92 (0.02) | |||||||
| i magnitude | 19.96 (0.03) | 19.96 (0.03) | 19.96 (0.03) | 19.96 (0.03) | 19.96 (0.03) | |||||||
| z magnitude | 20.18 (0.1) | 20.19 (0.1) | 20.19 (0.1) | 20.18 (0.1) | 20.18 (0.1) | |||||||
| G magnitude | 19.98 (0.07) | 20.03 | 19.98 (0.005) | |||||||||
| BP magnitude | 20.17 (0.07) | 20.17 | ||||||||||
| RP magnitude | 19.67 (0.05) | 19.73 | ||||||||||
| Pan g magnitude | 20.13 (0.01) | |||||||||||
| Pan r magnitude | 19.92 (0.02) | |||||||||||
| Pan i magnitude | 19.97 (0.01) | |||||||||||
| Pan z magnitude | 20.10 (0.02) | |||||||||||
| Pan y magnitude | 20.02 (0.2) | |||||||||||
| 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.