SDSS J073939.13+670916.5

All names: Gaia DR3 1095980241243640960, GALEX J073939.1+670916, SDSS J073939.13+670916.5, Gaia DR2 1095980241243640960, Gaia EDR3 1095980241243640960, SDSS J073939.12+670916.5, SDSS J073939.13+670916.50

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 07 39 39.15 (0.05) 07 39 39.12 07 39 39.15 (0.08) 07 39 39.15 07 39 39.12 (0.05) 07 39 39.13
Declination 67 09 16.48 (0.1) 67 09 16.54 67 09 16.48 (0.1) 67 09 16.48 67 09 16.57 (0.1) 67 09 16.52
Spectral type DBA DB DBA DBA DB
Effective temperature [K] 20275.0 20333.0 16272.0 19805.0 (137) 17893.0 (809) 21009.0 (718)
log(g) [cgs] 8.09 7.99 7.74 7.99 (0.03) 7.74 (0.08) 8.10 (0.03)
Mass [M] 0.651 0.595 0.454 0.458 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.0996
log(H/He) -4.65 <-4.4
log(C/He)
log(Ca/He) <-5.28
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] 2.66 (0.1) 2.79 (0.2) 2.66 2.66 (0.1)
Distance [pc] 376.20 (20) 358.49 (23) 349.00 376.20 376.21 (20)
Composition He
Proper motion (right ascension) [mas/yr] 9.958440937 (0.08) 9.920728607 (0.2) 9.958 (0.08)
Proper motion (declination) [mas/yr] -6.000324546 (0.1) -5.673808393 (0.3) -6.0 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.16 (0.02) 18.16 (0.02) 18.20 (0.02)
g magnitude 18.31 (0.007) 18.31 (0.007) 18.35 (0.02)
r magnitude 18.62 (0.01) 18.62 (0.01) 18.61 (0.01)
i magnitude 18.90 (0.02) 18.90 (0.02) 18.89 (0.01)
z magnitude 19.21 (0.06) 19.20 (0.06) 19.13 (0.04)
G magnitude 18.45 (0.008) 18.48 18.45 18.45 (0.003)
BP magnitude 18.40 (0.008) 18.36
RP magnitude 18.58 (0.02) 18.61
Pan g magnitude 18.36 (0.005)
Pan r magnitude 18.63 (0.01)
Pan i magnitude 18.89 (0.007)
Pan z magnitude 19.14 (0.01)
Pan y magnitude 19.38 (0.05)
E(B-V) 0.040

* 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.