WD 1441+047

All names: WD 1441+047, Gaia DR3 1158766577140118144, SDSS J144407.25+043446.7, Gaia DR2 1158766577140118144, Gaia EDR3 1158766577140118144, SDSS J144407.25+043446.8, J1444+0434, GALEX J144407.2+043446

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Coutu et al. 2019 Gaia DR2 Stilism Koester et al. 2006 Dufour et al. 2005 Liebert et al. 2003 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 14 44 07.28 (0.3) 14 44 07.25 14 44 07.26 14 44 07.28 (0.4) 14 44 07.26 (0.3) 14 44 07.25 14 44 07.20 14 44 07.25
Declination 04 34 46.31 (0.4) 04 34 46.77 04 34 46.79 04 34 46.33 (0.6) 04 34 46.77 (0.4) 04 34 46.77 04 34 44.40 04 34 46.78
Spectral type DQ DQ DQ DQ DQ DQhot DQ;CI DQ_CI hotDQ
Effective temperature [K] 9813.0 (301) 9449.0 9800.0 (270) 10000.0 11168.0 (280) 11328.0 (379)
log(g) [cgs] 8.44 8.00 (0) 8.00 (0) 8.56 (0.4) 9.47 (0.4)
Mass [M] 0.8653
log(Luminosity) [L]
Cooling age [Gyr] 1.3600
log(H/He)
log(C/He) -3.4736 (0.09) -3.65 (0.05) -2.98 (0.1)
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] 5.54 (0.6) 5.21 5.21 (0.7) 5.54 (0.6)
Distance [pc] 180.45 (18) 191.85 (25) 191.85 (25) 275.00 180.45 (18)
Composition He He He
Proper motion (right ascension) [mas/yr] 25.13019974 (0.5) 24.42406303 (1) 25.13 (0.5) 23.4
Proper motion (declination) [mas/yr] -28.83464995 (0.4) -29.73319446 (1) -28.835 (0.4) -33.7
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.59 (0.03) 19.59 (0.03) 19.58 (0.04) 19.35 19.60 (0.04)
g magnitude 19.59 (0.01) 19.59 (0.01) 19.60 (0.03) 19.60 19.61 (0.02)
r magnitude 19.67 (0.02) 19.67 (0.02) 19.70 (0.02) 19.69 19.70 (0.02)
i magnitude 19.81 (0.03) 19.81 (0.03) 19.83 (0.03) 19.82 19.83 (0.03)
z magnitude 20.16 (0.1) 20.16 (0.1) 20.14 (0.1) 20.14 20.15 (0.1)
G magnitude 19.61 (0.05) 19.67 19.61 (0.006)
BP magnitude 19.60 (0.05) 19.47
RP magnitude 19.54 (0.08) 19.32
Pan g magnitude 19.63 (0.009)
Pan r magnitude 19.71 (0.01)
Pan i magnitude 19.90 (0.04)
Pan z magnitude 20.01 (0.02)
Pan y magnitude 19.98 (0.04)
E(B-V) 0.024

* Constant surface field

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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.