Ton 534

All names: Ton 534, Gaia DR3 736093077399500032, Gaia DR2 736093077399500032, CSO 54, SDSS J103955.45+310643.53, SDSS J103955.45+310643.6, GALEX J103955.4+310643, Gaia EDR3 736093077399500032, LAMOST J103955.44+310643.7, SDSS J103955.45+310643.5

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Koester & Kepler 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 10 39 55.45 (0.07) 10 39 55.45 (0.1) 10 39 55.45 10 39 55.45 (0.07)
Declination 31 06 43.53 (0.09) 31 06 43.53 (0.2) 31 06 43.53 31 06 43.62 (0.09)
Spectral type DBA DBA DB DBA DB+MS
Effective temperature [K] 13292.0 12467.0 15533.0 13812.0 (123) 13529.0 (74) 13715.0 (396)
log(g) [cgs] 7.83 7.88 8.30 8.18 (0.1) 8.00 (0) 8.02 (0.04)
Mass [M] 0.492 0.52 0.777 0.685 (0.06) 0.599 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.3013
log(H/He) -4.554 -4.5 (0.2)
log(C/He)
log(Ca/He) <-8.81
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] 7.64 (0.09) 7.54 (0.2) 7.64 7.64 (0.09)
Distance [pc] 130.88 (2) 132.68 (3) 133.00 130.88 130.88 (2)
Composition He
Proper motion (right ascension) [mas/yr] -3.262123282 (0.08) -3.213965865 (0.2) -3.262 (0.08)
Proper motion (declination) [mas/yr] -5.707059274 (0.1) -5.839827405 (0.3) -5.707 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.12 (0.02) 17.15 (0.008)
g magnitude 17.04 (0.03) 17.01 (0.005)
r magnitude 17.27 (0.02) 17.28 (0.005)
i magnitude 17.55 (0.02) 17.55 (0.007)
z magnitude 18.08 (0.2) 18.13 (0.03)
G magnitude 17.13 (0.01) 17.16 17.13 17.13 (0.003)
BP magnitude 17.07 (0.01) 17.07
RP magnitude 16.98 (0.03) 17.01
Pan g magnitude 17.06 (0.007)
Pan r magnitude 17.26 (0.005)
Pan i magnitude 17.48 (0.01)
Pan z magnitude 18.25 (0.001)
Pan y magnitude
E(B-V) 0.008

* 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.