All names: uvby98 980155019, Gaia DR2 4154963942133386880, EGGR 177, WD 1827-106, UCAC4 397-080602, WD 1827-10, GEN# +9.80155019, G155-19, NLTT 46575, G 155-19, Gaia EDR3 4154963942133386880, Gaia DR3 4154963942133386880, WDJ183039.43-103659.93, TIC 215289126, 2MASS J18303946-1036598, 1827-106
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Leggett et al. 2018 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Gianninas et al. 2011 | Koester et al. 2009 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 30 39.62 (0.03) | 18 30 39.62 (0.05) | 18 30 39.62 | 18 30 39.43 (0.03) | 18 30 39.62 | 18 30 39.22 | ||||||||
| Declination | -10 37 03.70 (0.03) | -10 37 03.59 (0.05) | -10 37 03.70 | -10 36 59.93 (0.03) | -10 37 03.59 | -10 36 52.20 | ||||||||
| Spectral type | DA4.2 | DA | DA | DA3.6 | DA5 | |||||||||
| Effective temperature | [K] | 12016.0 (634) | 13869.0 | 15103.0 | 13890.0 (271) | 13670.0 (39) | 14599.0 (177) | |||||||
| log(g) | [cgs] | 7.65 (0.06) | 7.76 | 7.89 | 7.76 (0.05) | 7.56 (0.007) | 7.81 (0.01) | |||||||
| Mass | [M☉] | 0.425 (0.04) | 0.481 | 0.53 | 0.48 (0.02) | 0.508 (0.008) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 0.2390 (0.04) | 0.1750 | 0.1634 | ||||||||||
| 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] | 14.36 (0.04) | 14.96 (0.7) | 14.32 (0.06) | 14.36 | 14.36 (0.04) | 14.32 (0.06) | |||||||
| Distance | [pc] | 69.64 (0.2) | 66.84 (3) | 69.85 (0.3) | 43.00 | 69.64 | 69.64 (0.2) | 69.85 (0.3) | ||||||
| Composition | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 176.7937397 (0.04) | 176.7752857 (0.09) | 176.794 (0.04) | 176.7752857 | |||||||||
| Proper motion (declination) | [mas/yr] | -235.7631565 (0.04) | -235.9067449 (0.08) | -235.763 (0.04) | -235.9067449 | |||||||||
| Variability | NOV | |||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 15.41 (0.02) | |||||||||||||
| V magnitude | 14.25 | 15.28 (0.01) | ||||||||||||
| R magnitude | 15.82 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 15.02 (0.07) | |||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | ||||||||||||||
| g magnitude | 15.20 (0.01) | |||||||||||||
| r magnitude | 15.52 (0.01) | |||||||||||||
| i magnitude | ||||||||||||||
| z magnitude | ||||||||||||||
| G magnitude | 15.31 (0.002) | 15.33 | 15.31 | 15.31 (0.003) | 15.33 | |||||||||
| BP magnitude | 15.29 (0.002) | 15.28 | 15.28 | |||||||||||
| RP magnitude | 15.40 (0.003) | 15.40 | 15.40 | |||||||||||
| Pan g magnitude | 15.22 (0.002) | |||||||||||||
| Pan r magnitude | 15.46 (0.005) | |||||||||||||
| Pan i magnitude | 15.75 (0.003) | |||||||||||||
| Pan z magnitude | 15.96 (0.004) | |||||||||||||
| Pan y magnitude | 16.12 (0.003) | |||||||||||||
| E(B-V) | 0.003 | |||||||||||||
* 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.