PG 1225-079

All names: 1SWASP J122747.36-081438.0, uvby98 620169037, 2MASS J12274736-0814379, K 789-37, HE 1225-0758, Gaia DR2 3583181371265430656, KK 789-37, WD 1225-079, PG 1225-079, UCAC4 409-054373, Gaia DR3 3583181371265430656, PG1225-079, K789-37, PG 1225-079, TIC 368438980, Gaia EDR3 3583181371265430656, GALEX J122747.3-081437, WDJ122747.36-081437.97

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Gaia DR2 Stilism Xu et al. 2013 Klein et al. 2011 Farihi et al. 2010 Koester et al. 2005 Wolff et al. 2002 Weidemann and Koester 1995 Koester et al. 1990 Sion et al. 1990 Liebert et al. 1987 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 12 27 47.23 (0.02) 12 27 47.23 (0.05) 12 27 47.23 12 27 47.36 (0.02) 12 27 47.23 12 27 46.85
Declination -08 14 38.62 (0.02) -08 14 38.60 (0.03) -08 14 38.62 -08 14 37.97 (0.02) -08 14 38.60 -08 14 29.76
Spectral type DZAB DBAZ DBAZ DZA DZAB DZ DZA DZ DZA4 DZA
Effective temperature [K] 11248.0 (126) 10800.0 10500.0 10500.0 10500.0 10500.0 (300) 9700.0 9500.0 8700.0 9700.0 10261.0 (53)
log(g) [cgs] 8.18 (0.02) 8.00 7.70 8.00 8.00 (0.5) 7.89 (0.006)
Mass [M] 0.695 (0.01) 0.58 0.42 0.58 0.519 (0.005)
log(Luminosity) [L]
Cooling age [Gyr] 0.5900
log(H/He) -4.05 (0.1) -4.13 (0.1) -4.0 -3.8 (0.5) -3.8 (0.1) -3.3
log(C/He) -7.8 (0.1) <-7.5 <-8 -4.3
log(Ca/He) -8.06 (0.03) -8.25 (0.03) -7.9 -7.9 -7.9 (0.2) -8.8 (0.1) -8.8
log(Ca/H)
log(N/He)
log(O/He) <-5.54 <-5.69
log(Na/He) <-8.26 <-8.45
log(Mg/He) -7.5 (0.2) -7.44 (0.05) -7.6 (0.6) -8.1 (0.1) <-7.7
log(Al/He) <-7.84 <-8.04
log(Si/He) -7.45 (0.1) <-7.49 -7.6 (0.5) <-8
log(P/He)
log(S/He) <-9.50
log(Cl/He)
log(Sc/He) -11.29 (0.07) -11.57 (0.07)
log(Ti/He) -9.45 (0.02) -9.68 (0.02)
log(V/He) -10.41 (0.1) -10.68 (0.1)
log(Cr/He) -9.27 (0.06) -9.47 (0.06)
log(Mn/He) -9.79 (0.1) -10.03 (0.1)
log(Fe/He) -7.42 (0.07) -7.64 (0.03) -7.4 (0.3) -8 (0.1) <-8.5
log(Co/He)
log(Ni/He) -8.76 (0.1) -8.88 (0.1)
log(Cu/He)
log(Zn/He) <-11.30
log(Ga/He)
log(Ge/He)
log(Sr/He) <-11.65 <-11.90
Parallax [mas] 30.56 (0.03) 30.56 (0.03) 30.56 (0.06) 30.56 30.56 (0.03) 30.56 (0.06)
Distance [pc] 32.73 (0.03) 32.72 (0.03) 32.72 (0.06) 26.00 32.73 32.73 (0.03) 32.72 (0.06)
Composition He He He He He
Proper motion (right ascension) [mas/yr] -122.0537038 (0.04) -122.0599609 (0.1) -122.054 (0.04) -122.0599609
Proper motion (declination) [mas/yr] -40.46064132 (0.03) -40.44350039 (0.06) -40.461 (0.03) -40.44350039
Variability
Magnetic
Bd [MG]
Infrared excess (disk) yes
Binarity
B magnitude 14.86 (0.03)
V magnitude 14.80 14.74 (0.01)
R magnitude 15.15 (0.1)
I magnitude
J magnitude 14.88 (0.04)
H magnitude 14.92 (0.07)
K magnitude 14.85 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.73 (0.002) 14.75 14.73 14.73 (0.003) 14.75
BP magnitude 14.73 (0.002) 14.71 14.71
RP magnitude 14.72 (0.001) 14.72 14.72
Pan g magnitude 14.67 (0.003)
Pan r magnitude 14.85 (0.002)
Pan i magnitude 15.04 (0.003)
Pan z magnitude 15.24 (0.003)
Pan y magnitude 15.35 (0.006)
E(B-V) 0.001

* 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.