WD 2344+000

All names: WD 2344+000, SDSS J234709.29+001858.0, USNO-B1.0 0903-00594463, Gaia DR3 2642745397873170304, Gaia DR2 2642745397873170304, GALEX J234709.2+001858, SDSS J234709.29+001858.00, Gaia EDR3 2642745397873170304

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Eisenstein et al. 2006 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 23 47 09.30 (0.3) 23 47 09.30 23 47 09.30 (0.4) 23 47 09.30 23 47 09.29 (0.3) 23 47 08.76 23 47 09.29
Declination 00 18 58.09 (0.2) 00 18 58.09 00 18 58.09 (0.2) 00 18 58.05 00 18 57.98 (0.2) 00 18 58.32 00 18 58.04
Spectral type DB DB DB DB DB1.6 DB DB
Effective temperature [K] 34084.0 (3914) 33809.0 31711.0 22616.0 32900.0 (700) 32246.0 (1052)
log(g) [cgs] 8.07 (0.4) 7.84 7.48 7.18 7.80 (0.1) 8.02 (0.1)
Mass [M☉] 0.66 (0.2) 0.54 0.397 0.291
log(Luminosity) [L☉] -0.72 (0.3)
Cooling age [Gyr] 0.0066 (0.004) 0.0194
log(H/He) <-3.318
log(C/He)
log(Ca/He)
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] 1.63 (0.3) 1.08 (0.4) 1.63 (0.3)
Distance [pc] 615.21 (132) 924.22 (373) 615.20 (132)
Composition He He
Proper motion (right ascension) [mas/yr] 4.023515774 (0.4) 3.251392044 (0.6) 4.024 (0.4)
Proper motion (declination) [mas/yr] 6.75575099 (0.2) 6.236015676 (0.4) 6.756 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.76 (0.02) 18.78 (0.04) 18.76 (0.02) 18.78 18.80 (0.04)
g magnitude 18.95 (0.009) 19.00 (0.03) 18.95 (0.009) 19.00 19.00 (0.03)
r magnitude 19.36 (0.01) 19.39 (0.02) 19.36 (0.01) 19.38 19.38 (0.02)
i magnitude 19.71 (0.02) 19.66 (0.02) 19.71 (0.02) 19.65 19.65 (0.02)
z magnitude 19.89 (0.09) 20.07 (0.1) 19.89 (0.09) 20.07 20.05 (0.1)
G magnitude 19.17 (0.03) 19.21 19.17 (0.004)
BP magnitude 19.07 (0.03) 19.07
RP magnitude 19.33 (0.05) 19.27
Pan g magnitude 19.00 (0.009)
Pan r magnitude 19.36 (0.007)
Pan i magnitude 19.69 (0.007)
Pan z magnitude 19.91 (0.02)
Pan y magnitude 20.16 (0.09)
E(B-V) 0.034

* 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.