SDSS J155249.32+341945.3

All names: SDSS J155249.32+341945.2, Gaia EDR3 1371714251131163264, SDSS J155249.32+341945.3, Gaia DR3 1371714251131163264, Gaia DR2 1371714251131163264, GALEX J155249.3+341945, J1552+3419, WDJ155249.33+341945.02

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 52 49.28 (0.07) 15 52 49.32 15 52 49.28 (0.09) 15 52 49.28 15 52 49.33 (0.07) 15 52 49.28 15 52 49.32
Declination 34 19 45.80 (0.09) 34 19 45.23 34 19 45.78 (0.1) 34 19 45.80 34 19 45.02 (0.09) 34 19 45.78 34 19 45.28
Spectral type DC DC DC DC DA DC DC DA
Effective temperature [K] 7241.0 (81) 7332.0 (70) 7995.0 7685.0 7987.0 (149) 10080.0 (6)
log(g) [cgs] 8.01 (0.02) 8.06 (0.02) 8.32 8.22 8.31 (0.03) 9.74 (0.3)
Mass [M] 0.583 (0.02) 0.61 (0.02) 0.797 0.717 0.791 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 1.5700 1.9110 1.7560
log(H/He) -3.4 -3.6
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] 10.69 (0.1) 10.77 (0.1) 10.77 (0.1) 10.69 10.69 (0.1) 10.77 (0.1)
Distance [pc] 93.51 (0.9) 92.85 (1) 92.87 (1) 93.51 93.51 (0.9) 92.87 (1)
Composition He
Proper motion (right ascension) [mas/yr] -38.28763739 (0.1) -38.19601528 (0.2) -38.288 (0.1) -38.19601528
Proper motion (declination) [mas/yr] 48.68220709 (0.1) 49.03636734 (0.3) 48.682 (0.1) 49.03636734
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 17.98 (0.05)
H magnitude
K magnitude
u magnitude 18.86 (0.02) 18.85 (0.02) 18.86 (0.02) 18.86 (0.02) 18.86 (0.03)
g magnitude 18.41 (0.007) 18.41 (0.007) 18.41 (0.007) 18.42 (0.02)
r magnitude 18.29 (0.007) 18.29 (0.007) 18.29 (0.007) 18.28 (0.02)
i magnitude 18.32 (0.01) 18.32 (0.01) 18.32 (0.01) 18.33 (0.02)
z magnitude 18.39 (0.03) 18.39 (0.03) 18.39 (0.03) 18.39 (0.03)
G magnitude 18.28 (0.01) 18.30 18.28 18.28 (0.003) 18.30
BP magnitude 18.43 (0.01) 18.40 18.40
RP magnitude 18.04 (0.01) 18.02 18.02
Pan g magnitude 18.38 (0.01) 18.38 (0.01)
Pan r magnitude 18.30 (0.005) 18.30 (0.005)
Pan i magnitude 18.34 (0.005) 18.34 (0.005)
Pan z magnitude 18.43 (0.01) 18.43 (0.01)
Pan y magnitude 18.52 (0.02) 18.52 (0.02)
E(B-V) 0.014

* 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.