All names: GALEX J073038.2+253609, Gaia DR2 871565962347882496, LAMOST J073038.30+253610.6, SDSS J073038.31+253609.6, Gaia DR3 871565962347882496
| Parameter | Unit | Vincent et al. 2024 | Simbad |
|---|---|---|---|
| Right ascension | 07 30 38.31 | 07 30 38.31 (0.1) | |
| Declination | 25 36 09.59 | 25 36 09.74 (0.08) | |
| Spectral type | DA | DA | |
| Effective temperature | [K] | 16593.0 (688) | |
| log(g) | [cgs] | 8.20 (0.04) | |
| Mass | [M☉] | 0.734 (0.03) | |
| log(Luminosity) | [L☉] | ||
| Cooling age | [Gyr] | ||
| log(H/He) | |||
| log(C/He) | |||
| log(Ca/He) | |||
| log(Ca/H) | |||
| Parallax | [mas] | 5.78 | 5.78 (0.1) |
| Distance | [pc] | 172.97 | 172.97 (3) |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | -1.639 (0.1) | |
| Proper motion (declination) | [mas/yr] | -9.677 (0.09) | |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | |||
| V magnitude | |||
| R magnitude | |||
| I magnitude | |||
| J magnitude | |||
| H magnitude | |||
| K magnitude | |||
| u magnitude | 17.73 (0.01) | ||
| g magnitude | 17.46 (0.005) | ||
| r magnitude | 17.72 (0.006) | ||
| i magnitude | 18.03 (0.008) | ||
| z magnitude | 18.30 (0.03) | ||
| G magnitude | 17.63 | 17.63 (0.003) | |
| BP magnitude | |||
| RP magnitude | |||
| Pan g magnitude | |||
| Pan r magnitude | |||
| Pan i magnitude | |||
| Pan z magnitude | |||
| Pan y magnitude | |||
| E(B-V) | |||
* 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.