PG 0956+021

All names: Gaia DR3 3834721387994870784, COSMOS J095850.54+014724.3, J0958+0147, COSMOS 639982, Gaia EDR3 3834721387994870784, LAMOST J095850.56+014724.0, SDSS J095850.51+014724.1, SDSS J095850.56+014724.1, SDSS J095850.52+014724.2, TIC 275308213, [BGK2006] J095850.52+014724.1, WD 0956+020, Gaia DR2 3834721387994870784, GALEX J095850.5+014723, PG 0956+021, PSO J149.7106+01.7900, 2MASS J09585053+0147240, SDSS J095850.56+014724.11, WDJ095850.52+014724.17, WD0956+020, HE 0956+0201, SDSS J095850.56+014724.0, USNO-B1.0 0917-00193088

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 SDSS DR12 Kilic et al. 2025 Kilic et al. 2020 MWDD H Gaia DR2 Stilism Guo et al. 2015 Kepler et al. 2015 Gianninas et al. 2011 Koester et al. 2009 Koester et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999) Vincent et al. 2023
Right ascension 09 58 50.58 (0.05) 09 58 50.52 09 58 50.52 09 58 50.58 (0.09) 09 58 50.50 09 58 50.58 09 58 50.52 (0.05) 09 58 50.58 09 58 58.90
Declination 01 47 24.13 (0.04) 01 47 24.18 01 47 24.18 01 47 24.13 (0.07) 01 47 24.00 01 47 24.13 01 47 24.17 (0.04) 01 47 24.13 01 49 49.08
Spectral type DA DA DA DA DA DA DA DA DA3.0 DA DA3 DA
Effective temperature [K] 16304.0 (182) 16308.0 (182) 15537.0 16921.0 (53) 16630.0 (264) 16495.0 (25) 15267.0 (57) 16469.0 (249)
log(g) [cgs] 7.92 (0.01) 7.91 (0.02) 7.85 7.99 (0.01) 7.93 (0.05) 7.81 (0.006) 7.69 (0.01) 7.93 (0.01)
Mass [M] 0.57 (0.008) 0.563 (0.01) 0.533 0.611 (0.005) 0.58 (0.03) 0.46 0.577 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 0.1377
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] 11.67 (0.06) 11.58 (0.1) 11.67 11.67 (0.06) 11.58 (0.1)
Distance [pc] 85.68 (0.5) 86.36 (1) 81.00 85.68 85.68 (0.5) 86.36 (1)
Composition H H H
Proper motion (right ascension) [mas/yr] 60.09764713 (0.06) 59.86354192 (0.1) 60.098 (0.06) 59.864
Proper motion (declination) [mas/yr] -2.498457575 (0.05) -2.519346077 (0.1) -2.498 (0.05) -2.519
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.61 15.61 16.05
V magnitude
R magnitude 16.10
I magnitude
J magnitude 16.06 (0.009)
H magnitude 16.13 (0.02)
K magnitude 16.18 (0.03)
u magnitude 15.77 (0.005) 15.77 (0.005) 15.78 (0.01) 15.77 (0.005) 15.77 (0.005)
g magnitude 15.53 (0.003) 15.53 (0.003) 15.56 (0.02) 15.53 (0.003) 15.53 (0.003)
r magnitude 15.85 (0.004) 15.85 (0.004) 15.84 (0.02) 15.85 (0.004) 15.85 (0.004)
i magnitude 16.14 (0.005) 16.14 (0.005) 16.14 (0.02) 16.14 (0.005) 16.14 (0.005)
z magnitude 16.42 (0.009) 16.42 (0.009) 16.42 (0.02) 16.42 (0.009) 16.42 (0.009)
G magnitude 15.70 (0.003) 15.73 15.70 15.70 (0.003) 15.73
BP magnitude 15.66 (0.003) 15.65 15.65
RP magnitude 15.85 (0.004) 15.85 15.85
Pan g magnitude 15.58 (0.003)
Pan r magnitude 15.87 (0.002)
Pan i magnitude 16.15 (0.005)
Pan z magnitude 16.40 (0.007)
Pan y magnitude 16.55 (0.007)
E(B-V) 0.003

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit





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.