All names: UCAC2 43901439, LAMOST J002747.79+344026.6, HS 0025+3423, TIC 44486119, 2MASS J00274782+3440271, UCAC4 624-001401, Gaia EDR3 365939429892433920, SDSS J002747.80+344026.5, Gaia DR2 365939429892433920, GALEX J002747.7+344027, LAMOST J002747.80+344026.5, Gaia DR3 365939429892433920, HS0025+3423
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 00 27 47.80 (0.04) | 00 27 47.83 | 00 27 47.80 (0.04) | ||
| Declination | 34 40 26.47 (0.03) | 34 40 27.14 | 34 40 26.55 (0.03) | ||
| Spectral type | sdOB | sdBHe | |||
| Effective temperature | [K] | 32320.0 (1430) | |||
| log(g) | [cgs] | 5.75 (0.2) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.80 (0.07) | 0.84 (0.2) | 0.80 (0.07) | |
| Distance | [pc] | 1249.69 (105) | 1195.46 (222) | 1249.69 (105) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -6.185 (0.05) | -6.224 (0.1) | -6.185 (0.05) | |
| Proper motion (declination) | [mas/yr] | -5.387 (0.04) | -5.323 (0.1) | -5.387 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.62 (0.06) | ||||
| V magnitude | 15.85 (0.1) | ||||
| R magnitude | 16.15 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 16.25 (0.09) | 16.25 (0.09) | |||
| H magnitude | 16.25 (0.2) | 16.25 (0.2) | |||
| K magnitude | 16.92 | ||||
| u magnitude | 15.33 (0.004) | 15.33 (0.004) | |||
| g magnitude | 15.54 (0.003) | 15.54 (0.003) | |||
| r magnitude | 15.97 (0.003) | 15.97 (0.003) | |||
| i magnitude | 16.28 (0.004) | 16.28 (0.004) | |||
| z magnitude | 16.55 (0.009) | 16.55 (0.009) | |||
| G magnitude | 15.76 (0.003) | 15.77 (0.0009) | 15.76 (0.003) | ||
| BP magnitude | 15.64 (0.003) | 15.60 (0.009) | |||
| RP magnitude | 15.98 (0.005) | 15.97 (0.004) | |||
| Pan g magnitude | 15.62 (0.005) | ||||
| Pan r magnitude | 15.98 (0.005) | ||||
| Pan i magnitude | 16.30 (0.003) | ||||
| Pan z magnitude | 16.56 (0.002) | ||||
| Pan y magnitude | 16.71 (0.006) | ||||
| E(B-V) | 0.052 | ||||
* 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.