GALEX 2693726526589896277

All names: Gaia DR2 702780314621111936, SDSS J083905.08+255338.4, SDSS J083905.08+255338.40, SDSS J083905.07+255338.3, Gaia DR3 702780314621111936, Gaia EDR3 702780314621111936, GALEX 2693726526589896277, USNO-A2.0 1125-05693671

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 39 05.08 (0.2) 08 39 05.08 08 39 05.08 (0.3) 08 39 05.07 (0.3) 08 39 05.08
Declination 25 53 38.05 (0.2) 25 53 38.38 25 53 38.06 (0.2) 25 53 38.50 (0.2) 25 53 38.39
Spectral type DB DB DB DB
Effective temperature [K] 12634.0 12127.0 13068.0 (128) 13444.0 (237)
log(g) [cgs] 7.89 7.93 8.00 (0) 8.59 (0.2)
Mass [M] 0.524 0.546 0.956 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.3381
log(H/He) <-6.246 <-5.51
log(C/He)
log(Ca/He) <-8.86
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] 3.61 (0.3) 3.39 (0.4) 3.39 (0.4)
Distance [pc] 277.18 (20) 295.30 (35) 301.00 295.30 (35)
Composition He
Proper motion (right ascension) [mas/yr] 8.569240614 (0.3) 8.399782337 (0.6) 8.4 (0.6)
Proper motion (declination) [mas/yr] -27.86554161 (0.2) -27.79847162 (0.4) -27.798 (0.4)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.10 (0.3)
V magnitude
R magnitude 18.70 (0.3)
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.99 (0.02) 18.98 (0.02) 18.99 (0.02)
g magnitude 18.96 (0.009) 18.96 (0.009) 18.96 (0.02)
r magnitude 19.15 (0.01) 19.15 (0.01) 19.15 (0.02)
i magnitude 19.33 (0.02) 19.33 (0.02) 19.33 (0.02)
z magnitude 19.78 (0.09) 19.78 (0.09) 19.80 (0.1)
G magnitude 19.03 (0.03) 19.07 19.07 (0.003)
BP magnitude 19.05 (0.03) 18.95
RP magnitude 19.13 (0.05) 19.03
Pan g magnitude 18.96 (0.01)
Pan r magnitude 19.16 (0.009)
Pan i magnitude 19.36 (0.008)
Pan z magnitude 19.59 (0.02)
Pan y magnitude 19.46 (0.04)
E(B-V) 0.015

* 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.