All names: ** KPP 2763A, WDS J18430-1109A, GJ 2139, L 849-15, TIC 162708220, WD 1840-11, Gaia DR2 4107012041007171456, EGGR 200, LTT 7421, G 155-34, LP 751-14, Gaia EDR3 4107012041007171456, J1842-1108, DENIS J184257.7-110852, uvby98 980155034, WD 1840-111, Gaia DR3 4107012041007171456, NLTT 46893, G155-34, 2MASS J18425775-1108531, CNS5 4636, UCAC4 395-088788, WDJ184257.75-110853.18, GEN# +9.80155034
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Zuckerman et al. 2003 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 42 57.49 (0.02) | 18 42 57.50 (0.04) | 18 42 57.49 | 18 42 57.75 (0.02) | 18 42 57.50 | 18 42 58.75 | |||||||
| Declination | -11 08 57.20 (0.02) | -11 08 57.08 (0.04) | -11 08 57.20 | -11 08 53.18 (0.02) | -11 08 57.08 | -11 08 40.92 | |||||||
| Spectral type | DA | DA | DA | DA | DA4.9 | DA5 | |||||||
| Effective temperature | [K] | 9746.0 (96) | 9937.0 (19) | 10260.0 (148) | 10478.0 | 9816.0 (52) | |||||||
| log(g) | [cgs] | 8.00 (0.02) | 8.07 (0.003) | 8.30 (0.05) | 8.48 | 8.02 (0.009) | |||||||
| Mass | [M☉] | 0.598 (0.01) | 0.644 (0.003) | 0.79 (0.03) | 0.609 (0.007) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.7100 | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | <-9.743 | ||||||||||||
| 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] | 41.40 (0.03) | 41.40 (0.03) | 41.44 (0.05) | 41.44 (0.05) | 41.40 | 41.40 (0.03) | 41.44 (0.05) | |||||
| Distance | [pc] | 24.15 (0.02) | 24.15 (0.02) | 24.13 (0.03) | 24.13 (0.03) | 21.00 | 24.15 | 24.15 (0.02) | 24.13 (0.03) | ||||
| Composition | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -232.7951111 (0.03) | -232.6476715 (0.08) | -232.795 (0.03) | -232.6476715 | ||||||||
| Proper motion (declination) | [mas/yr] | -251.1095329 (0.02) | -251.0917948 (0.07) | -251.11 (0.02) | -251.0917948 | ||||||||
| Variability | NOV | ||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 14.46 (0.1) | ||||||||||||
| I magnitude | 14.01 (0.03) | ||||||||||||
| J magnitude | 14.14 (0.03) | 14.14 (0.03) | |||||||||||
| H magnitude | 14.04 (0.06) | 14.04 (0.06) | |||||||||||
| K magnitude | 14.16 (0.07) | 14.16 (0.07) | |||||||||||
| u magnitude | |||||||||||||
| g magnitude | |||||||||||||
| r magnitude | |||||||||||||
| i magnitude | |||||||||||||
| z magnitude | |||||||||||||
| G magnitude | 14.18 (0.001) | 14.19 | 14.18 | 14.18 (0.003) | 14.19 | ||||||||
| BP magnitude | 14.23 (0.001) | 14.22 | 14.22 | ||||||||||
| RP magnitude | 14.06 (0.003) | 14.07 | 14.07 | ||||||||||
| Pan g magnitude | 14.22 (0.002) | 14.22 (0.002) | |||||||||||
| Pan r magnitude | 14.29 (0.0002) | 14.29 (0.0002) | |||||||||||
| Pan i magnitude | 14.45 (0.008) | 14.45 (0.008) | |||||||||||
| Pan z magnitude | 14.59 (0.002) | 14.59 (0.002) | |||||||||||
| Pan y magnitude | 14.67 (0.001) | 14.67 (0.001) | |||||||||||
| E(B-V) | 0.001 | ||||||||||||
* 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.