V* IZ UMa

All names: GALEX J113941.4+420518, CBS 441, Gaia DR3 769375702394078208, WD 1137+423, 2MASS J11394142+4205187, SDSS J113941.39+420518.3, V* IZ UMa, SDSS J113941.38+420518.3, Gaia EDR3 769375702394078208, J1139+4205, KUV 11370+4222, WDJ113941.41+420518.43, Gaia DR2 769375702394078208, TIC 115861255, WD 1137+422

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Kilic et al. 2020 MWDD H Gaia DR2 Stilism Su et al. 2014 Gianninas et al. 2011 Vauclair et al. 1997 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Research Corporation White Dwarf Catalog (McCook & Sion 1999)
Right ascension 11 39 41.31 (0.05) 11 39 41.31 (0.08) 11 39 41.31 11 39 41.41 (0.05) 11 39 41.31 11 39 41.47
Declination 42 05 17.86 (0.07) 42 05 17.88 (0.07) 42 05 17.86 42 05 18.43 (0.07) 42 05 17.88 42 05 16.44
Spectral type DA DA DA DA DA DA4.1 DAV DA
Effective temperature [K] 11561.0 (58) 11568.0 (58) 11512.0 11940.0 12230.0 (190) 11940.0 11719.0 (168) 11890.0
log(g) [cgs] 8.03 (0.01) 8.01 (0.01) 8.00 8.17 8.22 (0.05) 8.17 8.04 (0.02) 8.06
Mass [M☉] 0.623 (0.009) 0.611 (0.01) 0.607 0.74 (0.03) 0.629 (0.01)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.4191
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] 11.05 (0.09) 10.89 (0.1) 11.05 11.05 (0.09) 10.89 (0.1)
Distance [pc] 90.48 (0.8) 91.80 (1) 83.00 90.48 90.47 (0.8) 91.80 (1)
Composition H H H
Proper motion (right ascension) [mas/yr] -72.7150427 (0.08) -72.88146768 (0.1) -72.715 (0.08) -72.88146768
Proper motion (declination) [mas/yr] -35.39722024 (0.08) -35.28937364 (0.1) -35.397 (0.08) -35.28937364
Variability VAR VAR VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude 16.50 16.50 16.56 16.56
R magnitude
I magnitude
J magnitude 16.48 (0.1)
H magnitude
K magnitude
u magnitude 16.96 (0.008) 16.96 (0.008) 16.96
g magnitude 16.51 (0.004) 16.51 (0.004) 16.51
r magnitude 16.69 (0.004) 16.69 (0.004) 16.69
i magnitude 16.88 (0.005) 16.88 (0.005) 16.88
z magnitude 17.08 (0.01) 17.08 (0.01) 17.09
G magnitude 16.60 (0.006) 16.61 16.60 16.60 (0.003) 16.61
BP magnitude 16.61 (0.006) 16.60 16.60
RP magnitude 16.58 (0.007) 16.58 16.58
Pan g magnitude 16.54 (0.001)
Pan r magnitude 16.70 (0.003)
Pan i magnitude 16.91 (0.005)
Pan z magnitude 17.11 (0.005)
Pan y magnitude 17.26 (0.007)
E(B-V) 0.004
Period #1 [s] 139.0 257.2
Amplitude #1 [mma] 2.6 5.8
Period #2 [s] 257.9 292.2
Amplitude #2 [mma] 18.3 2.7
Period #3 [s] 280.8 462.9
Amplitude #3 [mma] 2.7 3.5
Period #4 [s] 293.8
Amplitude #4 [mma] 3
Period #5 [s] 394.1
Amplitude #5 [mma] 4.5
Period #6 [s] 398.1
Amplitude #6 [mma] 2.5
Period #7 [s] 402.1
Amplitude #7 [mma] 2.4
Period #8 [s] 462.8
Amplitude #8 [mma] 8.4
Period #9 [s] 762.4
Amplitude #9 [mma] 2.8
Period #10 [s] 811.8
Amplitude #10 [mma] 2.5

* 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.