GD 9

All names: GD 9, WDJ010102.21-041110.67, NSV 368, GEN# +6.10060009, WD 0058-04, Gaia EDR3 2525337076653338240, EGGR 407, TIC 398570703, WD 0058-044, USNO-B1.0 0858-00009081, Gaia DR2 2525337076653338240, WD0058-044, GALEX J010102.2-041110, PHL 940, Gaia DR3 2525337076653338240, 2MASS J01010221-0411104

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Gianninas et al. 2011 Koester et al. 2009 Koester et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 01 01 02.33 (0.04) 01 01 02.32 (0.06) 01 01 02.30 01 01 02.33 01 01 02.21 (0.04) 01 01 02.32 01 00 56.45
Declination -04 11 10.05 (0.02) -04 11 10.07 (0.04) -04 11 11.00 -04 11 10.05 -04 11 10.67 (0.02) -04 11 10.07 -04 11 21.48
Spectral type DA DA DA DA DA DA DA2.9 DA3
Effective temperature [K] 16818.5 (122) 16812.0 16700.0 17370.0 (292) 16700.0 (62) 16955.0 (194)
log(g) [cgs] 8.03 (0.02) 8.03 8.07 8.10 (0.05) 8.07 (0.01) 8.03 (0.01)
Mass [M] 0.6355467505496681 (0.02) 0.631 0.67 (0.03) 0.633 (0.008)
log(Luminosity) [L]
Cooling age [Gyr] 0.1418
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] 13.86 (0.04) 13.89 (0.07) 13.86 13.86 (0.04) 13.89 (0.07)
Distance [pc] 72.14 (0.2) 71.97 (0.3) 70.00 72.14 72.14 (0.2) 71.97 (0.3)
Composition H H
Proper motion (right ascension) [mas/yr] 109.2048199 (0.05) 109.2084972 (0.1) 109.205 (0.05) 109.2084972
Proper motion (declination) [mas/yr] 38.43658201 (0.04) 38.45855903 (0.08) 38.437 (0.04) 38.45855903
Variability
Magnetic yes yes yes
Bd [MG] 0.325 (0.04) 0.3
Infrared excess (disk)
Binarity
B magnitude 15.41
V magnitude 15.38 15.38
R magnitude 15.60
I magnitude
J magnitude 15.85 (0.06)
H magnitude 15.85 (0.1)
K magnitude 15.95 (0.3)
u magnitude 15.46 (0.005)
g magnitude 15.28 (0.003)
r magnitude 15.58 (0.003)
i magnitude 15.86 (0.004)
z magnitude 16.15 (0.007)
G magnitude 15.43 (0.003) 15.44 15.43 15.43 (0.003) 15.44
BP magnitude 15.36 (0.003) 15.34 15.34
RP magnitude 15.57 (0.004) 15.57 15.57
Pan g magnitude 15.28 (0.002)
Pan r magnitude 15.59 (0.002)
Pan i magnitude 15.88 (0.004)
Pan z magnitude 16.13 (0.006)
Pan y magnitude 16.30 (0.005)
E(B-V) 0.002

* 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.