SDSS J070916.40+394039.7

All names: SDSS J070916.40+394039.7, LAMOST J070916.34+394038.8, Gaia DR2 947510299926167040, SDSS J070916.40+394039.8, GALEX J070916.4+394040, SDSS J070916.40+394039.80, Gaia DR3 947510299926167040, Gaia EDR3 947510299926167040

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 09 16.42 (0.06) 07 09 16.40 07 09 16.42 (0.08) 07 09 16.42 07 09 16.40 (0.06) 07 09 16.40
Declination 39 40 39.38 (0.05) 39 40 39.78 39 40 39.40 (0.07) 39 40 39.38 39 40 40.16 (0.05) 39 40 39.83
Spectral type DB DB DB DBA DB
Effective temperature [K] 16440.0 15401.0 15441.0 16597.0 (28) 16312.0 (598) 16700.0 (33)
log(g) [cgs] 8.05 7.97 7.98 8.04 (0.02) 8.06 (0.04) 8.21 (0.02)
Mass [M] 0.624 0.575 0.579 0.63 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.1751
log(H/He) -6.062 <-5.67
log(C/He)
log(Ca/He) <-6.73
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] 8.38 (0.07) 8.39 (0.1) 8.38 8.38 (0.07)
Distance [pc] 119.28 (1) 119.25 (1) 120.00 119.28 119.28 (1)
Composition He
Proper motion (right ascension) [mas/yr] 14.97404799 (0.07) 14.72334763 (0.2) 14.974 (0.07)
Proper motion (declination) [mas/yr] -48.74941876 (0.06) -48.71681212 (0.2) -48.749 (0.06)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 16.30 (0.006) 16.30 (0.006) 16.33 (0.01)
g magnitude 16.38 (0.004) 16.38 (0.004) 16.39 (0.01)
r magnitude 16.70 (0.005) 16.70 (0.005) 16.71 (0.01)
i magnitude 16.94 (0.006) 16.94 (0.006) 16.94 (0.01)
z magnitude 17.20 (0.01) 17.20 (0.01) 17.20 (0.02)
G magnitude 16.54 (0.005) 16.57 16.54 16.54 (0.003)
BP magnitude 16.49 (0.005) 16.44
RP magnitude 16.66 (0.01) 16.66
Pan g magnitude 16.44 (0.003)
Pan r magnitude 16.72 (0.004)
Pan i magnitude 16.99 (0.003)
Pan z magnitude 17.23 (0.01)
Pan y magnitude 17.33 (0.02)
E(B-V) 0.004

* 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.