GD 40

All names: WD 0300-01, LAMOST J030253.08-010833.8, SDSS J030253.10-010833.80, uvby98 610060040, SDSS J030253.08-010833.8, LAMOST J030253.08-010833.7, 0300-013, GALEX J030253.0-010834, SDSS J030253.08-010833.9, SDSS J030253.10-010833.7, J0302-0108, WD0300-013, TIC 439908180, WD 0300-019, WD 0300-013, SDSS J030253.08-010833.7, GD40, SDSS J030253.10-010833.8, FBS 0300-013, US 3561, Gaia DR3 5187830356195791488, GEN# +6.10060040, WDJ030253.10-010833.80, [HH86] 0300-013, KUV 03003-0120, GD 40, Gaia EDR3 5187830356195791488, 2MASS J03025311-0108335, EGGR 384, Gaia DR2 5187830356195791488, WIRED J030253.09-010833.7, PB 6987

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Coutu et al. 2019 Leggett et al. 2018 MWDD H MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Jura et al. 2012 Zuckerman et al. 2011 Bergeron et al. 2011 Zuckerman et al. 2010 Farihi et al. 2010 Klein et al. 2010 Voss et al. 2007 Jura et al. 2007 Koester et al. 2005 Koester et al. 2001 Friedrich et al. 1999 Sion et al. 1990 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 03 02 53.01 (0.04) 03 02 53.09 03 02 53.10 03 02 53.01 (0.05) 03 02 53.20 03 02 53.01 03 02 53.10 (0.04) 03 02 53.01 03 02 53.09 03 02 53.71 03 02 53.10
Declination -01 08 34.37 (0.03) -01 08 33.79 -01 08 33.80 -01 08 34.35 (0.05) -01 08 35.00 -01 08 34.37 -01 08 33.80 (0.03) -01 08 34.35 -01 08 33.86 -01 08 28.32 -01 08 33.76
Spectral type DBZA DBZ3.6 DBAZ DBAZ DBAZ DBAZ DBAZ DBZA DB DBZ DB DBZ4 DBZ DBZ4 DB DB
Effective temperature [K] 14430.0 14226.0 13594.0 (1735) 13921.0 (428) 13008.0 13843.0 15097.0 (20) 15300.0 15300.0 14780.0 (362) 15300.0 15000.0 15300.0 (500) 15319.0 15200.0 15200.0 14930.0 15150.0 (600) 14000.0 14255.0 (211) 16051.0 (15) 15551.0 (34)
log(g) [cgs] 7.70 8.05 8.02 8.11 (0.04) 7.93 8.00 8.00 (0) 8.00 (0) 8.00 8.13 (0.09) 8.00 (0) 8.00 8.00 8.02 (0.02) 8.42 (0.02) 8.52 (0.02)
Mass [M] 0.432 0.617 0.5986 0.651 (0.03) 0.569 0.588 0.67 (0.06) 0.587 0.602 (0.01) 0.912 (0.01)
log(Luminosity) [L] -2.23
Cooling age [Gyr] 0.2770 0.2990 (0.03) 0.2728 0.2543 0.2692 1.9000 2.1620
log(H/He) -6.254 -6.1137 (0.2) -5.86 (0.4) -5.1 (0.6) -6.11 (1) -6.16 (0.2) -6.02 -5.3
log(C/He) -7.8 (0.2) -7.2 (0.2) -7.22 (0.1)
log(Ca/He) -7.5821 (0.1) -6.96 (0.1) -6.9 (0.2) -6.88 -7.0 -6.9 -6.88 (0.2) -6.7 -6.7 (0.4)
log(Ca/H)
log(N/He) <-8.8 <-5.3
log(O/He) -5.62 (0.1) -5.61 (0.09)
log(Na/He) <-7.0
log(Mg/He) -6.2 (0.2) -6.24 (0.1) -6.0 (0.4)
log(Al/He) -7.35 (0.1) <-7.1
log(Si/He) -6.44 (0.3) -6.76 (0.08) -6.52 (0.3)
log(P/He) -8.68 (0.1) <-8.2
log(S/He) -7.8 (0.2)
log(Cl/He) <-9.06
log(Sc/He) <-9.8
log(Ti/He) -8.61 (0.2) -8.61 (0.2)
log(V/He) <-9.0
log(Cr/He) -8.31 (0.1) -8.31 (0.1)
log(Mn/He) -8.64 (0.1) -8.62 (0.2)
log(Fe/He) -6.47 (0.1) -6.48 (0.1) -6.22 (0.07)
log(Co/He)
log(Ni/He) -7.84 (0.3) <-7.7
log(Cu/He) <-9.91
log(Zn/He)
log(Ga/He) <-10.8
log(Ge/He) <-10.2
log(Sr/He) <-10.1
Parallax [mas] 15.36 (0.05) 15.52 16.61 (0.3) 15.52 (0.07) 15.36 15.36 (0.05) 15.52 (0.07)
Distance [pc] 65.10 (0.2) 64.42 (0.3) 60.20 (1) 64.42 (0.3) 68.00 64.00 64.00 65.10 65.10 (0.2) 64.42 (0.3)
Composition He He He He He
Proper motion (right ascension) [mas/yr] -88.80193194 (0.06) -88.88504829 (0.1) -88.802 (0.06) -88.88504829 -88.9
Proper motion (declination) [mas/yr] -35.6566836 (0.05) -35.65982286 (0.1) -35.657 (0.04) -35.65982286 -34.2
Variability
Magnetic
Bd [MG]
Infrared excess (disk) yes yes
Binarity
B magnitude 15.51
V magnitude 15.56 15.56 15.56 15.56 15.56
R magnitude
I magnitude
J magnitude 15.82 (0.01)
H magnitude 15.86 (0.01)
K magnitude 15.79 (0.02)
u magnitude 15.28 (0.004) 15.28 (0.004) 15.31 (0.004) 15.31 (0.02) 15.31 15.33 (0.02)
g magnitude 15.34 (0.004) 15.34 (0.004) 15.35 (0.003) 15.40 (0.02) 15.40 15.40 (0.02)
r magnitude 15.63 (0.005) 15.63 (0.005) 15.65 (0.004) 15.64 (0.01) 15.64 15.64 (0.02)
i magnitude 15.85 (0.005) 15.85 (0.005) 15.87 (0.005) 15.88 (0.02) 15.88 15.87 (0.02)
z magnitude 16.11 (0.007) 16.11 (0.007) 16.11 (0.007) 16.12 (0.02) 16.12 16.10 (0.02)
G magnitude 15.49 (0.002) 15.51 15.49 15.49 (0.003) 15.51
BP magnitude 15.44 (0.002) 15.42 15.42
RP magnitude 15.55 (0.004) 15.56 15.56
Pan g magnitude 15.41 (0.003)
Pan r magnitude 15.64 (0.002)
Pan i magnitude 15.89 (0.002)
Pan z magnitude 16.10 (0.003)
Pan y magnitude 16.25 (0.007)
E(B-V) 0.001

* 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.