EGGR 476

All names: NLTT 9567, WD 0257+080, PSO J044.9978+08.1987, UCAC2 34580781, J0259+0811, TIC 387609758, WD 0257+08, G76-48, 2MASS J02595915+0811564, LTT 17447, G 76-48, PM J02599+0811, WDJ025959.15+081156.43, USNO 409, USNO-B1.0 0981-00037405, Gaia DR2 8578256576520320, Gaia DR3 8578256576520320, LHS 5064, 02599+0811, EGGR 476, Gaia EDR3 8578256576520320, LSPM J0259+0811, PLX 624.01

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Hardy et al. 2023a Caron et al. 2023 McCleery et al. 2020 Blouin et al. 2019 MWDD H Gaia DR2 Bedard et al. 2017 Stilism Ferrario et al. 2015 Limoges et al. 2015 Gianninas et al. 2011 Koester et al. 2009 Bergeron et al. 2001 Bergeron et al. 1997 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 02 59 59.66 (0.04) 02 59 59.65 (0.05) 02 59 59.65 (0.05) 02 59 59.66 02 59 59.15 (0.04) 02 59 59.65 02 59 57.43
Declination 08 11 55.22 (0.03) 08 11 55.26 (0.04) 08 11 55.26 (0.04) 08 11 55.22 08 11 56.43 (0.03) 08 11 55.26 08 11 52.80
Spectral type DAH DA DAH DAH DAH DA DA DA DAP DA DA DA DA7.8 DA8
Effective temperature [K] 6528.0 (62) 6344.2 (75) 6601.0 (28) 6456.7 (57) 6405.0 (40) 6544.0 6619.0 (130) 6680.0 (150) 6740.0 (480) 6430.0 (103) 6680.0 (150) 6680.0 (150) 6603.0 (34)
log(g) [cgs] 7.81 (0.03) 7.77 (0.1) 7.84 (0.007) 7.78 (0.02) 7.77 (0.02) 7.83 7.78 (0.1) 7.96 (0.1) 7.40 (0.1) 7.96 (0.2) 7.96 (0.1) 7.84 (0.01)
Mass [M] 0.482 (0.01) 0.4600318048808138 (0.1) 0.501 (0.006) 0.463 (0.01) 0.494 0.39 (0.1) 0.57 (0.09) 0.57 (0.09) 0.33 (0.05) 0.57 (0.09) 0.57 (0.09) 0.499 (0.008)
log(Luminosity) [L] -3.50 -3.51 (0.08) -3.51 (0.08)
Cooling age [Gyr] 1.4600 1.3940 (0.04) 1.4200 1.6000 (0.4) 1.6900 (0.4)
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] 33.94 (0.04) 33.94 (0.04) 33.91 (0.06) 33.91 (0.06) 33.91 (0.06) 33.91 (0.06) 35.90 (4) 35.90 (4) 35.90 (4) 33.94 33.94 (0.04) 33.91 (0.06) 35.90 (4)
Distance [pc] 29.47 (0.04) 29.46 (0.03) 29.49 (0.05) 29.49 (0.05) 29.49 (0.05) 29.49 (0.05) 27.90 (3) 27.90 (3) 37.00 27.86 (3) 27.86 (3) 29.47 29.47 (0.04) 29.49 (0.05) 27.86 (3)
Composition H H H H H H H H
Proper motion (right ascension) [mas/yr] 479.7221882 (0.05) 479.7926517 (0.09) 479.722 (0.05) 479.7926517
Proper motion (declination) [mas/yr] -75.68573541 (0.04) -75.58456166 (0.08) -75.686 (0.04) -75.58456166
Variability
Magnetic yes yes yes
Bd [MG] 0.1 * 0.09
Infrared excess (disk)
Binarity
B magnitude 16.33 16.33 16.33
V magnitude 15.90 15.90 15.90
R magnitude 15.62 15.62 15.30
I magnitude 15.32 15.32
J magnitude 15.03 (0.006) 14.97 (0.04) 15.01 15.01 14.97 (0.04)
H magnitude 14.75 (0.06) 14.75 (0.06) 14.84 14.84 14.75 (0.06)
K magnitude 14.85 (0.1) 14.85 (0.1) 14.80 14.80 14.85 (0.1)
u magnitude
g magnitude 16.06 (0.001)
r magnitude 15.78 (0.005)
i magnitude 15.73 (0.0005)
z magnitude 15.80 (0.02)
G magnitude 15.78 (0.005) 15.79 15.79 15.78 15.78 (0.003) 15.79
BP magnitude 16.01 (0.005) 16.01 16.01
RP magnitude 15.40 (0.004) 15.39 15.39
Pan g magnitude 16.02 (0.01) 16.02 (0.01) 16.06 (0.001)
Pan r magnitude 15.82 (0.002) 15.82 (0.002) 15.78 (0.005)
Pan i magnitude 15.74 (0.002) 15.74 (0.002) 15.73 (0.001)
Pan z magnitude 15.74 (0.007) 15.74 (0.007) 15.80 (0.02)
Pan y magnitude 15.76 (0.004) 15.76 (0.004) 15.79 (0.01)
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.