CSO 497

All names: SDSS J144251.44+414012.9, SDSS J144251.45+414012.9, Gaia EDR3 1489703805980259712, GALEX J144251.4+414012, Gaia DR2 1489703805980259712, WD 1440+418, Gaia DR3 1489703805980259712, CSO 497

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Tremblay et al. 2011 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 14 42 51.45 (0.05) 14 42 51.45 14 42 51.45 (0.06) 14 42 51.45 14 42 51.44 (0.05) 14 42 51.45 14 42 51.02 14 42 51.45
Declination 41 40 12.14 (0.06) 41 40 12.94 41 40 12.17 (0.07) 41 40 12.14 41 40 13.10 (0.06) 41 40 12.95 41 40 11.64 41 40 12.95
Spectral type DA DA DA DA DA_auto DA DA DA
Effective temperature [K] 14507.0 15750.0 (160) 16050.0 (350) 14784.0 (147) 15465.0 (119)
log(g) [cgs] 7.92 8.02 (0.03) 8.04 (0.02) 7.85 (0.03) 7.90 (0.03)
Mass [M] 0.564 0.62 (0.02) 0.64 (0.02) 0.562 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 0.1920 0.1778
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 6.31 (0.07) 6.20 (0.09) 6.31 6.31 (0.07)
Distance [pc] 158.40 (2) 161.19 (2) 158.40 158.40 (2)
Composition H H
Proper motion (right ascension) [mas/yr] 6.521765813 (0.06) 6.608057079 (0.1) 6.522 (0.06) 7.8
Proper motion (declination) [mas/yr] -60.19935771 (0.08) -60.30511529 (0.1) -60.199 (0.08) -61.2
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.00
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.46 (0.009) 17.46 (0.009) 17.44 (0.02) 17.44 17.47 (0.02)
g magnitude 17.12 (0.004) 17.12 (0.004) 17.12 (0.01) 17.12 17.12 (0.01)
r magnitude 17.40 (0.005) 17.41 (0.005) 17.37 (0.02) 17.37 17.39 (0.02)
i magnitude 17.65 (0.007) 17.65 (0.007) 17.68 (0.03) 17.68 17.68 (0.03)
z magnitude 17.94 (0.02) 17.94 (0.02) 17.93 (0.03) 17.93 17.93 (0.03)
G magnitude 17.28 (0.006) 17.30 17.28 17.28 (0.003)
BP magnitude 17.25 (0.006) 17.22
RP magnitude 17.40 (0.008) 17.38
Pan g magnitude 17.17 (0.009)
Pan r magnitude 17.43 (0.008)
Pan i magnitude 17.69 (0.004)
Pan z magnitude 17.94 (0.002)
Pan y magnitude 18.12 (0.05)
E(B-V) 0.017

* 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.