SDSS J163908.82+381913.5

All names: Gaia EDR3 1331532770495421952, WD 1637+384, SDSS J163908.82+381913.50, Gaia DR2 1331532770495421952, SDSS J163908.82+381913.5, Gaia DR3 1331532770495421952, [CCS88] 1637.4+3825, SDSS J163908.81+381913.5

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 39 08.80 (0.2) 16 39 08.81 16 39 08.80 (0.3) 16 39 08.81 (0.2) 16 39 08.82 16 39 08.21 16 39 08.82
Declination 38 19 14.09 (0.3) 38 19 13.55 38 19 14.07 (0.5) 38 19 13.55 (0.3) 38 19 13.60 38 19 10.20 38 19 13.53
Spectral type DB DB DB DB DB: DB
Effective temperature [K] 15952.0 13364.0 16438.0 (461) 15975.0 (511)
log(g) [cgs] 8.67 8.48 8.48 (0.3) 8.38 (0.3)
Mass [M] 1.013 0.896
log(Luminosity) [L]
Cooling age [Gyr] 0.6079
log(H/He) <-5.748
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] 2.60 (0.3) 3.01 (0.5) 2.60 (0.3)
Distance [pc] 384.94 (48) 331.83 (52) 384.94 (48)
Composition He
Proper motion (right ascension) [mas/yr] -12.41783937 (0.3) -12.49182258 (0.7) -12.418 (0.3) 4.1
Proper motion (declination) [mas/yr] 33.52555904 (0.4) 33.47229971 (1) 33.526 (0.4) 20.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 19.20
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.93 (0.04) 19.93 (0.04) 19.61 (0.04) 19.60 19.61 (0.04)
g magnitude 20.14 (0.02) 20.14 (0.02) 19.75 (0.02) 19.74 19.73 (0.02)
r magnitude 20.02 (0.02) 20.02 (0.02) 20.07 (0.02) 20.07 20.06 (0.02)
i magnitude 24.36 (0.7) 24.36 (0.7) 20.37 (0.04) 20.37 20.36 (0.04)
z magnitude 20.71 (0.2) 20.71 (0.2) 20.67 (0.2) 20.67 20.68 (0.2)
G magnitude 19.88 (0.04) 19.96 19.88 (0.005)
BP magnitude 19.86 (0.04) 19.76
RP magnitude 19.79 (0.09) 19.78
Pan g magnitude 19.79 (0.01)
Pan r magnitude 20.07 (0.02)
Pan i magnitude 20.30 (0.02)
Pan z magnitude 20.43 (0.03)
Pan y magnitude 19.96 (0.1)
E(B-V) 0.019

* 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.