All names: SDSS J144843.55+083522.2, SDSS J144843.57+083522.3, PG1446+088, Gaia DR3 1173616997796784384, SDSS J144843.55+083522.3, Gaia EDR3 1173616997796784384, PG 1446+088, GALEX J144843.6+083521, SDSS J144843.57+083522.2, SDSS J144843.58+083522.2, SDSS J144843.55+083522.31, Gaia DR2 1173616997796784384
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Bedard et al. 2020 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 14 48 43.54 (0.07) | 14 48 43.58 | 14 48 43.75 | 14 48 43.55 (0.1) | 14 48 43.54 | 14 48 43.60 (0.07) | ||||||
| Declination | 08 35 22.27 (0.08) | 08 35 22.30 | 08 35 22.36 | 08 35 22.27 (0.1) | 08 35 22.27 | 08 35 22.25 (0.08) | ||||||
| Spectral type | DAO | sdO | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 64960.0 (1702) | 81270.0 (1623) | 242888.0 (102743) | ||||||||
| log(g) | [cgs] | 6.98 (0.07) | 7.43 (0.06) | 8.08 (0.4) | ||||||||
| Mass | [M☉] | 0.39 (0.02) | 0.5670000000000001 (0.008) | 2.051 (1) | ||||||||
| log(Luminosity) | [L☉] | 1.26 (0.07) | ||||||||||
| Cooling age | [Gyr] | 0.0001 | ||||||||||
| 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] | 1.33 (0.1) | 1.24 (0.2) | 1.24 (0.2) | 1.33 | 1.33 (0.1) | ||||||
| Distance | [pc] | 750.78 (65) | 804.89 (100) | 804.92 (99) | 750.78 | 750.75 (65) | ||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -46.9927181 (0.09) | -47.222 (0.2) | -47.22189308 (0.2) | -46.993 (0.09) | |||||||
| Proper motion (declination) | [mas/yr] | 1.37238074 (0.09) | 1.621 (0.3) | 1.621130432 (0.3) | 1.372 (0.09) | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 17.00 (0.01) | |||||||||||
| H magnitude | 17.16 (0.03) | |||||||||||
| K magnitude | 17.09 (0.06) | |||||||||||
| u magnitude | 15.44 (0.005) | 15.44 (0.005) | 15.44 (0.02) | 15.44 (0.005) | ||||||||
| g magnitude | 15.89 (0.004) | 15.89 (0.004) | 15.88 (0.02) | 15.89 (0.004) | ||||||||
| r magnitude | 16.45 (0.005) | 16.45 (0.005) | 16.45 (0.01) | 16.45 (0.005) | ||||||||
| i magnitude | 16.82 (0.006) | 16.82 (0.006) | 16.82 (0.02) | 16.82 (0.006) | ||||||||
| z magnitude | 17.17 (0.01) | 17.17 (0.01) | 17.16 (0.02) | 17.17 (0.01) | ||||||||
| G magnitude | 16.17 (0.003) | 16.20 (0.003) | 16.20 | 16.17 | 16.17 (0.003) | |||||||
| BP magnitude | 16.00 (0.003) | 15.95 (0.01) | 15.95 | |||||||||
| RP magnitude | 16.53 (0.006) | 16.52 (0.006) | 16.52 | |||||||||
| Pan g magnitude | 15.99 (0.005) | 15.99 (0.005) | ||||||||||
| Pan r magnitude | 16.47 (0.005) | 16.47 (0.005) | ||||||||||
| Pan i magnitude | 16.85 (0.005) | 16.85 (0.005) | ||||||||||
| Pan z magnitude | 17.15 (0.004) | 17.14 (0.004) | ||||||||||
| Pan y magnitude | 17.38 (0.007) | 17.38 (0.007) | ||||||||||
| E(B-V) | 0.025 | |||||||||||
* 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.