GJ 4191

All names: BPM 27273, 2MASS J21193652-5550144, Gaia DR3 6462911897617050240, NLTT 50967, WDJ211936.53-555014.47, WD 2115-560, USNO-B1.0 0341-00810336, WG 38, WISEA J211937.07-555016.4, TIC 231668155, EC 21159-5602, LAWD 84, L 212-19, CNS5 5255, uvby98 600108452, LTT 8452, GSC 08797-01005, WD 2115-56, GEN# +9.86212019, GALEX J211936.8-555015, GJ 4191, Gaia EDR3 6462911897617050240, Gaia DR2 6462911897617050240

Parameter Unit Gaia EDR3 O'Brien et al. 2024 Gaia DR2 Stilism Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Farihi et al. 2010 Koester et al. 2009 von Hippel et al. 2007 Koester et al. 2005 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 21 19 37.35 (0.02) 21 19 37.33 (0.02) 21 19 36.48 21 19 37.35 21 19 36.53 (0.02) 21 19 37.33 21 19 26.11
Declination -55 50 17.52 (0.01) -55 50 17.42 (0.02) -55 50 13.20 -55 50 17.52 -55 50 14.47 (0.01) -55 50 17.42 -55 50 18.60
Spectral type DAZ DA6 DAZ DA DAZ DA DA DA5.1 DA6
Effective temperature [K] 9529.0 (76) 9736.0 9877.0 (141) 9880.0 (141) 9500.0 9625.0 (7) 9700.0 9700.0 9518.0 (32)
log(g) [cgs] 7.97 (0.02) 7.96 (0.05) 8.27 (0.05) 8.01 (0.007) 8.10 8.10 7.96 (0.006)
Mass [M] 0.579 (0.01) 0.58 (0.03) 0.77 (0.03) 0.66 0.577 (0.005)
log(Luminosity) [L] -2.83
Cooling age [Gyr] 0.5900
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) -7.6
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] 39.91 (0.02) 39.91 (0.02) 39.85 (0.03) 39.91 39.91 (0.02) 39.85 (0.03)
Distance [pc] 25.06 (0.01) 25.06 (0.01) 25.09 (0.02) 22.00 26.50 (1) 21.00 25.06 25.06 (0.01) 25.09 (0.02)
Composition H H H
Proper motion (right ascension) [mas/yr] 431.0638603 (0.02) 431.1370901 (0.05) 431.064 (0.02) 431.1370901
Proper motion (declination) [mas/yr] -190.7808392 (0.02) -190.7696146 (0.05) -190.781 (0.02) -190.7696146
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk) yes yes
Binarity
B magnitude 14.50
V magnitude 14.28 14.28 14.27
R magnitude 14.50
I magnitude
J magnitude 14.11 (0.03)
H magnitude 14.00 (0.06)
K magnitude 14.02 (0.06)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.27 (0.0009) 14.29 14.27 14.27 (0.003) 14.29
BP magnitude 14.34 (0.0009) 14.34 14.34
RP magnitude 14.15 (0.0009) 14.16 14.16
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
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.