PHL 1255

All names: SDSS J021836.78-091944.3, SDSS J021836.69-091944.8, Gaia EDR3 5176159517007960576, SDSS J021836.70-091945.0, WD 0216-095, Gaia DR2 5176159517007960576, J0218-0919, PHL 1255, SDSS J021836.70-091944.8, GALEX J021836.7-091944, SDSS J021836.74-091944.6, Gaia DR3 5176159517007960576, WDJ021836.69-091944.94, WIRED J021836.70-091945.0

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Caron et al. 2023 Coutu et al. 2019 MWDD H MWDD HE Gaia DR2 Stilism Dufour et al. 2007 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 02 18 36.84 (0.06) 02 18 36.74 02 18 36.69 02 18 36.84 (0.1) 02 18 36.84 02 18 36.69 (0.06) 02 18 36.84 02 18 36.69 02 18 35.47 02 18 36.70
Declination -09 19 44.08 (0.07) -09 19 44.61 -09 19 44.94 -09 19 44.11 (0.1) -09 19 44.08 -09 19 44.93 (0.07) -09 19 44.11 -09 19 44.88 -09 19 42.24 -09 19 45.02
Spectral type DZ DZ DZ DC DZ DZ DZ DZ DZ DZ
Effective temperature [K] 10007.0 (86) 10273.0 (321) 10349.0 10390.0 9560.0 (300) 9714.0 (165) 10192.0 (109) 10443.0 (203)
log(g) [cgs] 8.11 (0.02) 8.19 8.26 8.20 8.00 8.01 (0.03) 8.76 (0.3) 9.51 (0.3)
Mass [M] 0.647 (0.01) 0.6985 0.763 0.705 0.586 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.7600 0.7710 0.8137 0.7595
log(H/He) -5.0 <-5.8399 <-5.0
log(C/He)
log(Ca/He) -10.13 -9.8138 (0.04) -10.63 (0.07)
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] 10.16 (0.09) 10.40 (0.1) 10.40 10.40 (0.1) 10.16 10.16 (0.09) 10.40 (0.1)
Distance [pc] 98.41 (0.8) 96.15 (1) 96.17 (1) 96.17 (1) 97.00 98.41 98.41 (0.8) 96.17 (1)
Composition He He He
Proper motion (right ascension) [mas/yr] 134.7345587 (0.1) 134.9527275 (0.2) 134.735 (0.1) 134.953 132.0
Proper motion (declination) [mas/yr] 53.20382161 (0.09) 53.59767299 (0.2) 53.204 (0.09) 53.598 54.9
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.10
V magnitude 18.20
R magnitude
I magnitude
J magnitude 17.41 (0.02)
H magnitude
K magnitude 17.47 (0.09)
u magnitude 17.49 (0.01) 17.48 (0.009) 17.49 (0.01) 17.47 (0.01) 17.50 (0.01) 17.52 17.47 (0.01)
g magnitude 17.33 (0.005) 17.33 (0.005) 17.32 (0.004) 17.32 (0.04) 17.30 17.32 (0.04)
r magnitude 17.45 (0.005) 17.45 (0.005) 17.44 (0.005) 17.39 (0.04) 17.40 17.41 (0.04)
i magnitude 17.60 (0.007) 17.61 (0.007) 17.58 (0.007) 17.57 (0.02) 17.57 17.59 (0.02)
z magnitude 17.78 (0.02) 17.78 (0.02) 17.77 (0.02) 17.84 (0.03) 17.85 17.83 (0.03)
G magnitude 17.36 (0.009) 17.40 17.36 17.36 (0.003) 17.40
BP magnitude 17.40 (0.009) 17.36 17.36
RP magnitude 17.30 (0.01) 17.25 17.25
Pan g magnitude 17.36 (0.006) 17.36 (0.006)
Pan r magnitude 17.46 (0.004) 17.46 (0.004)
Pan i magnitude 17.62 (0.004) 17.62 (0.004)
Pan z magnitude 17.79 (0.008) 17.79 (0.007)
Pan y magnitude 17.90 (0.02) 17.90 (0.02)
E(B-V) 0.002

* 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.