All names: WDJ154729.99+065909.61, SDSS J154729.96+065909.5, GALEX J154730.0+065909, SDSS J154729.91+065909.1, Gaia DR2 4430165650933432576, Gaia DR3 4430165650933432576, J1547+0659, WIRED J154729.96+065909.5, SDSS J154729.97+065909.5, Gaia EDR3 4430165650933432576
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | Coutu et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 47 29.88 (0.09) | 15 47 29.97 | 15 47 29.99 | 15 47 29.88 (0.09) | 15 47 29.88 | 15 47 29.99 (0.09) | 15 47 29.88 | 15 47 29.97 | |||||||
| Declination | 06 59 08.94 (0.09) | 06 59 09.53 | 06 59 09.61 | 06 59 08.96 (0.09) | 06 59 08.94 | 06 59 09.61 (0.09) | 06 59 08.96 | 06 59 09.53 | |||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | |||||||||
| Effective temperature | [K] | 8690.0 (67) | 8737.0 (244) | 9866.0 | 9713.0 | 8649.0 (184) | 10100.0 (32) | ||||||||
| log(g) | [cgs] | 8.03 (0.01) | 8.04 | 8.32 | 8.25 | 7.98 (0.03) | 9.57 (0.3) | ||||||||
| Mass | [M☉] | 0.593 (0.01) | 0.6049 | 0.803 | 0.735 | 0.565 (0.03) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 0.9800 | 0.9420 | 1.0190 | 0.9605 | ||||||||||
| log(H/He) | -5.0 | <-5.3626 | |||||||||||||
| log(C/He) | |||||||||||||||
| log(Ca/He) | -9.74 | -9.7435 (0.03) | |||||||||||||
| log(Ca/H) | |||||||||||||||
| log(N/He) | |||||||||||||||
| log(O/He) | |||||||||||||||
| log(Na/He) | |||||||||||||||
| log(Mg/He) | |||||||||||||||
| 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) | |||||||||||||||
| log(Mn/He) | |||||||||||||||
| log(Fe/He) | |||||||||||||||
| log(Co/He) | |||||||||||||||
| log(Ni/He) | |||||||||||||||
| log(Cu/He) | |||||||||||||||
| log(Zn/He) | |||||||||||||||
| log(Ga/He) | |||||||||||||||
| log(Ge/He) | |||||||||||||||
| log(Sr/He) | |||||||||||||||
| Parallax | [mas] | 11.42 (0.1) | 11.40 (0.1) | 11.40 | 11.40 (0.1) | 11.42 | 11.42 (0.1) | 11.40 (0.1) | |||||||
| Distance | [pc] | 87.53 (0.8) | 87.72 (0.8) | 87.75 (0.9) | 87.75 (0.9) | 87.53 | 87.53 (0.8) | 87.75 (0.9) | |||||||
| Composition | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -99.02534888 (0.1) | -98.85971022 (0.2) | -99.025 (0.1) | -98.85971022 | ||||||||||
| Proper motion (declination) | [mas/yr] | -41.94907026 (0.1) | -41.91969844 (0.2) | -41.949 (0.1) | -41.91969844 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | |||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 17.36 (0.04) | 17.35 (0.04) | |||||||||||||
| H magnitude | 17.30 (0.04) | 17.30 (0.04) | |||||||||||||
| K magnitude | 17.28 (0.07) | 17.28 (0.07) | |||||||||||||
| u magnitude | 17.76 (0.01) | 17.74 (0.01) | 17.76 (0.01) | 17.75 (0.01) | 17.76 (0.02) | ||||||||||
| g magnitude | 17.45 (0.005) | 17.45 (0.005) | 17.45 (0.005) | 17.46 (0.02) | |||||||||||
| r magnitude | 17.51 (0.006) | 17.51 (0.006) | 17.51 (0.006) | 17.52 (0.02) | |||||||||||
| i magnitude | 17.63 (0.007) | 17.63 (0.007) | 17.60 (0.007) | 17.61 (0.01) | |||||||||||
| z magnitude | 17.80 (0.02) | 17.80 (0.02) | 17.79 (0.02) | 17.81 (0.03) | |||||||||||
| G magnitude | 17.44 (0.007) | 17.46 | 17.44 | 17.44 (0.003) | 17.46 | ||||||||||
| BP magnitude | 17.52 (0.007) | 17.51 | 17.51 | ||||||||||||
| RP magnitude | 17.33 (0.01) | 17.33 | 17.33 | ||||||||||||
| Pan g magnitude | 17.45 (0.007) | 17.45 (0.006) | |||||||||||||
| Pan r magnitude | 17.50 (0.004) | 17.50 (0.004) | |||||||||||||
| Pan i magnitude | 17.65 (0.003) | 17.65 (0.003) | |||||||||||||
| Pan z magnitude | 17.78 (0.008) | 17.78 (0.01) | |||||||||||||
| Pan y magnitude | 17.93 (0.01) | 17.93 (0.02) | |||||||||||||
| E(B-V) | 0.008 | ||||||||||||||
* 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.