All names: CSO 227, SDSS J093103.31+333947.7, SDSS J093103.31+333947.77, SDSS J093103.33+333948.2, Gaia DR2 797421976276060544, Ton 1069, GALEX J093103.3+333948, Gaia DR3 797421980572884864, LAMOST J093103.31+333947.9, Gaia EDR3 797421980572884864
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Guo et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 31 03.31 (0.1) | 09 31 03.33 | 09 31 03.31 (1) | 09 31 03.31 | 09 31 03.35 (0.1) | ||||||
| Declination | 33 39 47.55 (0.1) | 33 39 48.29 | 33 39 47.57 (0.5) | 33 39 47.55 | 33 39 48.32 (0.1) | ||||||
| Spectral type | DA | DA | DA | DA | DA | DA | |||||
| Effective temperature | [K] | 30109.0 (139) | 30184.0 (122) | 30551.0 (409) | 32087.0 (1270) | ||||||
| log(g) | [cgs] | 7.91 (0.04) | 7.94 (0.02) | 7.90 (0.1) | 7.96 (0.06) | ||||||
| Mass | [M☉] | 0.6 (0.02) | 0.6 (0.05) | 0.63 (0.04) | |||||||
| log(Luminosity) | [L☉] | -0.83 (0.02) | |||||||||
| Cooling age | [Gyr] | 0.0087 (0.0002) | |||||||||
| 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] | 3.03 (0.1) | 3.03 | 3.03 (0.1) | |||||||
| Distance | [pc] | 330.42 (16) | 330.42 | 330.41 (16) | |||||||
| Composition | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -28.48588091 (0.1) | -28.486 (0.1) | ||||||||
| Proper motion (declination) | [mas/yr] | -47.86172419 (0.1) | -47.862 (0.1) | ||||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 16.80 | ||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 18.00 (0.04) | ||||||||||
| H magnitude | 18.05 (0.09) | ||||||||||
| K magnitude | |||||||||||
| u magnitude | 16.88 (0.007) | 16.85 (0.02) | 16.88 (0.007) | ||||||||
| g magnitude | 17.09 (0.004) | 17.16 (0.08) | 17.09 (0.004) | ||||||||
| r magnitude | 17.61 (0.006) | 17.67 (0.03) | 17.61 (0.006) | ||||||||
| i magnitude | 17.98 (0.009) | 17.98 (0.02) | 17.98 (0.009) | ||||||||
| z magnitude | 19.30 (0.06) | 19.00 (0.04) | 18.30 (0.03) | ||||||||
| G magnitude | 17.38 (0.006) | 17.38 | 17.38 | 17.38 (0.003) | |||||||
| BP magnitude | 17.24 (0.006) | 17.11 | |||||||||
| RP magnitude | 17.66 (0.01) | 17.62 | |||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.016 | ||||||||||
* 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.