All names: GALEX J090027.5+204559, SDSS J090027.55+204559.8, SDSS J090027.55+204559.5, Gaia DR3 684781270617966208, Gaia EDR3 684781270617966208, Gaia DR2 684781270617966208, SDSS J090027.55+204559.58
Parameter | Unit | Gaia EDR3 | SDSS DR10 | Hardy et al. 2023a | MWDD H | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Vincent et al. 2023 |
---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 09 00 27.55 (0.3) | 09 00 27.56 | 09 00 27.55 (0.4) | 09 00 27.56 (0.3) | ||||||
Declination | 20 45 59.56 (0.2) | 20 45 59.80 | 20 45 59.56 (0.2) | 20 45 59.68 (0.2) | ||||||
Spectral type | DA | DAH: | DAH: | DAH | DA | |||||
Effective temperature | [K] | 18925.8 (2166) | 3766.0 | 21483.0 (311) | ||||||
log(g) | [cgs] | 8.06 (0.2) | 8.29 | 8.00 (0.05) | ||||||
Mass | [M☉] | 0.6555501660509979 (0.2) | 0.765 | |||||||
log(Luminosity) | [L☉] | |||||||||
Cooling age | [Gyr] | 10.9800 | ||||||||
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] | 1.76 (0.4) | 2.10 (0.5) | 1.76 (0.4) | ||||||
Distance | [pc] | 568.95 (119) | 476.04 (116) | 568.96 (119) | ||||||
Composition | H | |||||||||
Proper motion (right ascension) | [mas/yr] | -3.206447339 (0.4) | -2.413775116 (0.7) | -3.206 (0.4) | ||||||
Proper motion (declination) | [mas/yr] | -7.498514638 (0.2) | -7.204546447 (0.4) | -7.499 (0.2) | ||||||
Variability | ||||||||||
Magnetic | ||||||||||
Bd | [MG] | |||||||||
Infrared excess (disk) | ||||||||||
Binarity | ||||||||||
B magnitude | ||||||||||
V magnitude | ||||||||||
R magnitude | ||||||||||
I magnitude | ||||||||||
J magnitude | ||||||||||
H magnitude | ||||||||||
K magnitude | ||||||||||
u magnitude | 19.44 (0.03) | 19.38 (0.03) | 19.44 (0.03) | |||||||
g magnitude | 19.30 (0.01) | 19.26 (0.03) | 19.30 (0.01) | |||||||
r magnitude | 24.80 (0.7) | 24.80 (7) | 24.80 (0.7) | |||||||
i magnitude | 24.36 (0.6) | 24.36 (4) | 24.36 (0.6) | |||||||
z magnitude | 20.46 (0.2) | 20.40 (0.2) | 20.46 (0.2) | |||||||
G magnitude | 19.41 (0.04) | 19.46 | 19.41 (0.004) | |||||||
BP magnitude | 19.33 (0.04) | 19.23 | ||||||||
RP magnitude | 19.53 (0.09) | 19.49 | ||||||||
Pan g magnitude | ||||||||||
Pan r magnitude | ||||||||||
Pan i magnitude | ||||||||||
Pan z magnitude | ||||||||||
Pan y magnitude | ||||||||||
E(B-V) | 0.030 |
* Constant surface field
Spectra without link are available upon request
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.