SDSS J094209.49+540157.5

All names: SDSS J094209.49+540157.50, Gaia DR2 1021347930273637888, SDSS J094209.48+540157.3, Gaia EDR3 1021347930273637888, SDSS J094209.49+540157.5, GALEX J094209.4+540157, SDSS J094209.48+540157.4, Gaia DR3 1021347930273637888

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Hardy et al. 2023b 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 09 42 09.46 (0.3) 09 42 09.49 09 42 09.46 (0.3) 09 42 09.48 (0.3) 09 42 09.49
Declination 54 01 57.54 (0.2) 54 01 57.32 54 01 57.53 (0.3) 54 01 57.35 (0.2) 54 01 57.52
Spectral type HotDC DBH DBH DBH DC
Effective temperature [K] 21169.1 (4181) 52702.0 36052.0 16769.0 14404.0 (2437)
log(g) [cgs] 9.04 (0.2) 7.52 9.28 8.79 9.82 (0.7)
Mass [M] 1.205971552 (0.2) 0.466 1.344 1.083
log(Luminosity) [L]
Cooling age [Gyr] 0.5460
log(H/He) <-3.28
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] 3.34 (0.3) 3.19 (0.5) 3.34 (0.3)
Distance [pc] 299.16 (28) 313.42 (46) 299.16 (28)
Composition He
Proper motion (right ascension) [mas/yr] -14.05459833 (0.3) -13.92127236 (0.7) -14.055 (0.3)
Proper motion (declination) [mas/yr] 12.07555357 (0.3) 12.03040563 (0.6) 12.076 (0.3)
Variability
Magnetic yes
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.22 (0.02) 19.22 (0.03) 19.35 (0.03)
g magnitude 19.62 (0.01) 19.62 (0.01) 19.64 (0.03)
r magnitude 20.02 (0.02) 20.02 (0.02) 20.06 (0.03)
i magnitude 20.29 (0.04) 20.29 (0.04) 20.28 (0.04)
z magnitude 20.56 (0.2) 20.56 (0.2) 20.77 (0.2)
G magnitude 19.82 (0.03) 19.87 19.82 (0.004)
BP magnitude 19.67 (0.03) 19.70
RP magnitude 19.98 (0.06) 20.00
Pan g magnitude 19.67 (0.02)
Pan r magnitude 20.04 (0.02)
Pan i magnitude 20.29 (0.01)
Pan z magnitude 20.36 (0.05)
Pan y magnitude 20.46 (0.2)
E(B-V) 0.019

* 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.