EGGR 7

All names: EPIC 220418473, 2MASS J01034993+0504306, 01038+0504, Gaia EDR3 2552121179905893888, CSI+04-01012, GJ 1027, G 1-45, WD 0101+04, LTT10380, WISEA J010350.15+050432.9, PSO J015.9591+05.0759, Gaia DR2 2552121179905893888, ** WNO 50C, WDS J01024+0504C, UBV 1028, UCAC4 476-001615, Gaia DR3 2552121179905893888, G 70-32, G 2-17, WD 0101+048, USNO-B1.0 0950-00009995, G1-45, J0103+0504, PG 0101+048, PM J01038+0504, UBV M 53412, GEN# +9.80001045, CNS5 300, TIC 344718494, LSPM J0103+0504E, NLTT 3509, WDJ010349.92+050430.57, EGGR 7, LTT 10380, USNO 214, GCRV 51104, PLX 210.01

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Blouin et al. 2019 MWDD H Gaia DR2 Bedard et al. 2017 Stilism Holberg et al. 2016 Limoges et al. 2015 Giammichele et al. 2012 Gianninas et al. 2011 Koester et al. 2009 Liebert et al. 2005 Zuckerman et al. 2003 Bergeron et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 01 03 50.27 (0.07) 01 03 50.26 (0.09) 01 03 50.26 (0.09) 01 03 50.27 01 03 49.92 (0.07) 01 03 50.26 01 03 49.32
Declination 05 04 34.27 (0.05) 05 04 34.16 (0.06) 05 04 34.16 (0.06) 05 04 34.27 05 04 30.57 (0.05) 05 04 34.16 05 04 23.16
Spectral type DA DA DA DA DA DA DA DA DA DA DA DA DA DA5.9 DA6
Effective temperature [K] 8064.0 (59) 8094.0 (13) 8057.2 (24) 7965.0 (60) 7935.0 8343.0 (121) 8039.0 (200) 8480.0 (122) 8062.0 (200) 8580.0 (124) 8387.0 (5) 8530.0 (123) 8042.0 8080.0 (200) 8219.0 (25)
log(g) [cgs] 7.54 (0.02) 7.47 (0.004) 7.52 (0.01) 7.45 (0.02) 7.43 8.04 (0.05) 7.33 (0.1) 8.17 (0.05) 7.54 (0.1) 8.37 (0.05) 7.99 (0.007) 8.27 (0.05) 7.54 7.55 (0.1) 7.53 (0.006)
Mass [M] 0.388 (0.007) 0.337 (0.002) 0.329 (0.006) 0.321 0.3 (0.04) 0.7 (0.04) 0.36 (0.05) 0.83 (0.04) 0.77 (0.04) 0.37 (0.05) 0.36 (0.004)
log(Luminosity) [L] -3.22 -2.96 -3.27 -2.96 (0.07)
Cooling age [Gyr] 0.5900 0.6120 (0.01) 0.6073 0.5300 0.6300 1.5136 0.6300 (0.07)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-11.376
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] 45.42 (0.09) 45.42 (0.09) 44.86 (0.1) 44.86 (0.1) 44.86 (0.1) 44.86 (0.1) 46.90 (4) 46.90 (4) 46.90 (4) 46.90 (4) 45.42 45.42 (0.09) 44.86 (0.1) 45.00 (4)
Distance [pc] 22.02 (0.04) 22.02 (0.04) 22.29 (0.06) 22.29 (0.06) 22.29 (0.06) 22.29 (0.06) 20.90 (2) 21.32 (2) 21.30 (2) 21.30 (2) 13.00 14.00 21.32 (2) 22.02 22.02 (0.04) 22.29 (0.06) 22.22 (2)
Composition H H H H H H H H H
Proper motion (right ascension) [mas/yr] 325.9296578 (0.1) 325.1806435 (0.2) 325.93 (0.1) 325.1806435
Proper motion (declination) [mas/yr] 231.6133933 (0.06) 231.698236 (0.1) 231.613 (0.07) 231.698236
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity DDu DDu DDU
B magnitude 14.26 14.26 14.29 (0.03)
V magnitude 14.05 14.00 13.96 14.03 14.00 13.97 (0.03)
R magnitude 13.83 13.83 14.03 (0.06)
I magnitude 13.66 13.66
J magnitude 13.49 (0.002) 13.50 (0.02) 13.51 13.51 13.50 (0.02)
H magnitude 13.38 (0.003) 13.40 (0.03) 13.39 13.39 13.40 (0.03)
K magnitude 13.42 (0.03) 13.42 (0.03) 13.38 13.38 13.42 (0.03)
u magnitude 14.48 (0.004) 14.50 (0.003)
g magnitude 14.10 (0.02) 14.05 (0.003)
r magnitude 13.99 (0.03) 13.99 (0.004)
i magnitude 14.05 (0.2) 14.56 (0.003)
z magnitude 14.12 (0.003) 14.10 (0.004)
G magnitude 13.94 (0.0008) 13.95 13.95 13.94 13.94 (0.003) 13.95
BP magnitude 14.06 (0.0008) 14.07 14.07
RP magnitude 13.71 (0.0008) 13.72 13.72
Pan g magnitude 14.06 (0.003) 14.06 (0.004) 14.06 (0.004)
Pan r magnitude 14.01 (0.002) 14.01 (0.002) 14.01 (0.002)
Pan i magnitude 14.05 (0.003) 14.05 (0.003) 14.05 (0.003)
Pan z magnitude 14.12 (0.003) 14.12 (0.002) 14.12 (0.002)
Pan y magnitude 14.18 (0.003) 14.18 (0.003) 14.18 (0.003)
E(B-V) 0.000

* 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.