WD 0846+474

All names: Gaia DR2 1013776353903292928, Gaia DR3 1013776353903292928, SDSS J084952.82+471248.7, SDSS J084952.87+471249.4, Gaia EDR3 1013776353903292928, SDSS J084952.82+471248.78, EQ J0849+472, SDSS J084952.86+471249.5, WD 0846+474, ** SLN 14A, WDS J08499+4713A, US 1731.1, LAMOST J084952.80+471248.7

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Vincent et al. 2023
Right ascension 08 49 52.75 (0.05) 08 49 52.87 08 49 52.87 08 49 52.76 (0.07) 08 49 52.75 08 49 52.88 (0.05) 08 49 52.54
Declination 47 12 48.25 (0.04) 47 12 49.45 47 12 49.45 47 12 48.29 (0.06) 47 12 48.25 47 12 49.58 (0.04) 47 12 48.96
Spectral type DB DB DB DB DA DB
Effective temperature [K] 17261.0 18073.0 16760.0 17321.0 (40) 17240.0 (43) 17090.0 (420)
log(g) [cgs] 8.18 8.06 7.96 8.14 (0.02) 8.11 (0.02) 7.99 (0.03)
Mass [M] 0.7 0.631 0.571 0.6709999999999999 (0.01) 0.589 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.1279
log(H/He) <-6.048 <-5.35
log(C/He)
log(Ca/He) <-6.07
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] 6.57 (0.07) 6.54 (0.1) 6.57 6.57 (0.07)
Distance [pc] 152.17 (2) 152.88 (2) 138.00 152.17 152.17 (2)
Composition He
Proper motion (right ascension) [mas/yr] -83.77953586 (0.07) -83.79965739 (0.1) -83.78 (0.07)
Proper motion (declination) [mas/yr] -83.17271822 (0.05) -83.11554781 (0.1) -83.173 (0.05)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 16.59 (0.006) 16.61 (0.006) 16.61 (0.02) 16.61 (0.006)
g magnitude 16.69 (0.004) 16.71 (0.004) 16.73 (0.02) 16.71 (0.004)
r magnitude 17.05 (0.005) 17.06 (0.005) 17.06 (0.01) 17.06 (0.005)
i magnitude 17.30 (0.006) 17.31 (0.006) 17.32 (0.01) 17.31 (0.006)
z magnitude 17.58 (0.01) 17.60 (0.01) 17.59 (0.02) 17.59 (0.01)
G magnitude 16.87 (0.003) 16.89 16.87 16.87 (0.003)
BP magnitude 16.80 (0.003) 16.74
RP magnitude 16.99 (0.005) 16.99
Pan g magnitude 16.76 (0.003)
Pan r magnitude 17.03 (0.005)
Pan i magnitude 17.32 (0.003)
Pan z magnitude 17.56 (0.004)
Pan y magnitude 17.72 (0.01)
E(B-V) 0.007

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit





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.