SDSS J084430.69+105813.1

All names: GALEX J084430.7+105813, Gaia DR3 598800629557063296, Gaia EDR3 598800629557063296, SDSS J084430.67+105812.9, SDSS J084430.69+105813.10, SDSS J084430.69+105813.1, Gaia DR2 598800629557063296, SDSS J084430.68+105813.1, SDSS J084430.68+105813.0

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 44 30.67 (0.3) 08 44 30.69 08 44 30.67 (0.4) 08 44 30.70 (0.3) 08 44 30.69
Declination 10 58 12.90 (0.2) 10 58 13.11 10 58 12.91 (0.3) 10 58 13.18 (0.2) 10 58 13.11
Spectral type DB DB DB DB
Effective temperature [K] 13892.0 15397.0 12947.0 14758.0 (264)
log(g) [cgs] 7.63 8.16 7.94 8.32 (0.2)
Mass [M] 0.402 0.688 0.551 0.781 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.2826
log(H/He) <-6.198
log(C/He)
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] 2.50 (0.3) 2.85 (0.5) 2.50 (0.3)
Distance [pc] 400.03 (49) 350.90 (60) 400.03 (49)
Composition He
Proper motion (right ascension) [mas/yr] -30.87385914 (0.3) -30.25729954 (0.8) -30.874 (0.3)
Proper motion (declination) [mas/yr] -18.01292464 (0.3) -18.1110992 (0.6) -18.013 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.06 (0.02) 19.06 (0.02) 19.06 (0.02)
g magnitude 19.13 (0.01) 19.13 (0.01) 19.13 (0.02)
r magnitude 19.38 (0.01) 19.38 (0.01) 19.37 (0.02)
i magnitude 19.64 (0.02) 19.64 (0.02) 19.65 (0.02)
z magnitude 19.87 (0.07) 19.86 (0.07) 19.86 (0.07)
G magnitude 19.23 (0.02) 19.27 19.23 (0.004)
BP magnitude 19.21 (0.02) 19.16
RP magnitude 19.35 (0.06) 19.40
Pan g magnitude 19.17 (0.009)
Pan r magnitude 19.40 (0.008)
Pan i magnitude 19.63 (0.02)
Pan z magnitude 19.80 (0.03)
Pan y magnitude 19.87 (0.06)
E(B-V) 0.027

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit





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.