SDSS J093130.31+073054.6

All names: Gaia DR2 586292933172097408, SDSS J093130.31+073054.60, SDSS J093130.30+073054.6, GALEX J093130.3+073053, J0931+0730, SDSS J093130.31+073054.6, Gaia DR3 586292933172097408, Gaia EDR3 586292933172097408

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Coutu et al. 2019 Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 09 31 30.30 (0.4) 09 31 30.31 09 31 30.31 09 31 30.30 (0.6) 09 31 30.31 (0.4) 09 31 30.31
Declination 07 30 54.72 (0.3) 07 30 54.64 07 30 54.60 07 30 54.72 (0.6) 07 30 54.60 (0.3) 07 30 54.64
Spectral type DBZ DBZ DBZ DZ
Effective temperature [K] 13316.0 12314.0 11699.0 (537) 11778.0 (196) 11952.0 (468)
log(g) [cgs] 8.37 7.80 7.75 8.00 (0) 8.25 (0.4)
Mass [M] 0.82 0.478 0.4492
log(Luminosity) [L]
Cooling age [Gyr] 0.2960
log(H/He) -5.45 <-6.1044 <-5.43
log(C/He)
log(Ca/He) -8.275 (0.3) -9.02 (0.3)
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] 2.82 (0.4) 2.24 2.24 (0.8) 2.82 (0.4)
Distance [pc] 354.27 (55) 445.55 (163) 445.55 (163) 375.00 354.27 (55)
Composition He
Proper motion (right ascension) [mas/yr] -11.66052981 (0.4) -11.46527587 (1) -11.661 (0.4)
Proper motion (declination) [mas/yr] 7.644013681 (0.3) 7.631885935 (1) 7.644 (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 19.89 (0.04) 19.89 (0.04) 19.89 (0.04)
g magnitude 19.70 (0.01) 19.70 (0.01) 19.71 (0.02)
r magnitude 19.88 (0.02) 19.88 (0.02) 19.92 (0.02)
i magnitude 20.11 (0.03) 20.11 (0.03) 20.14 (0.04)
z magnitude 20.30 (0.2) 20.30 (0.2) 20.30 (0.2)
G magnitude 19.81 (0.04) 19.87 19.81 (0.005)
BP magnitude 19.86 (0.04) 19.68
RP magnitude 19.77 (0.08) 19.49
Pan g magnitude 19.78 (0.01)
Pan r magnitude 19.91 (0.02)
Pan i magnitude 20.10 (0.02)
Pan z magnitude 20.36 (0.03)
Pan y magnitude 20.11 (0.07)
E(B-V) 0.025

* 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.