All names: NLTT 19768, 2MASS J08340026+3659240, SDSS J083400.24+365923.6, EGGR 486, TIC 468448790, WD 0830+371, LAMOST J083400.13+365921.7, KUV 08308+3710, USNO-B1.0 1269-00180286, WD 0830+37, SDSS J083400.23+365923.6, UCAC4 635-044217, G115-9, G 115-9, Gaia DR3 910087768838947456, Gaia DR2 910087768838947456, WDJ083400.26+365924.12, GEN# +9.80115009, CBS 75, LSPM J0834+3659, Gaia EDR3 910087768838947456, J0834+3659
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 34 00.08 (0.04) | 08 34 00.08 (0.05) | 08 34 00.08 | 08 34 00.26 (0.04) | 08 34 00.08 | 08 34 00.48 | |||||||
| Declination | 36 59 20.36 (0.02) | 36 59 20.48 (0.03) | 36 59 20.36 | 36 59 24.12 (0.02) | 36 59 20.48 | 36 59 29.76 | |||||||
| Spectral type | DA | DA | DA | DA | DA | DA5.5 | DA5 | ||||||
| Effective temperature | [K] | 8922.0 (40) | 9012.0 (37) | 8922.0 (40) | 9250.0 (134) | 9124.0 (51) | |||||||
| log(g) | [cgs] | 7.98 (0.008) | 8.00 (0.008) | 7.98 (0.009) | 8.33 (0.06) | 8.03 (0.009) | |||||||
| Mass | [M☉] | 0.585 (0.007) | 0.596 (0.007) | 0.583 (0.007) | 0.81 (0.04) | 0.617 (0.008) | |||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.8200 | |||||||||||
| 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] | 20.23 (0.04) | 20.18 (0.07) | 20.18 (0.07) | 20.23 | 20.23 (0.04) | 20.18 (0.07) | ||||||
| Distance | [pc] | 49.44 (0.1) | 49.55 (0.2) | 49.57 (0.2) | 40.00 | 49.44 | 49.44 (0.1) | 49.57 (0.2) | |||||
| Composition | H | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -140.1794189 (0.04) | -140.3757393 (0.1) | -140.179 (0.04) | -140.3757393 | ||||||||
| Proper motion (declination) | [mas/yr] | -234.9673682 (0.04) | -235.0346841 (0.07) | -234.967 (0.04) | -235.0346841 | ||||||||
| Variability | NOV | ||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 15.60 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 15.85 (0.2) | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 15.77 (0.01) | 15.68 (0.05) | |||||||||||
| H magnitude | 15.64 (0.1) | 15.64 (0.1) | |||||||||||
| K magnitude | 15.41 (0.2) | 15.41 (0.2) | |||||||||||
| u magnitude | 16.45 (0.006) | 16.46 (0.006) | 16.46 (0.006) | ||||||||||
| g magnitude | 16.04 (0.004) | 16.04 (0.004) | |||||||||||
| r magnitude | 16.06 (0.004) | 16.06 (0.004) | |||||||||||
| i magnitude | 16.15 (0.005) | 16.15 (0.005) | |||||||||||
| z magnitude | 16.27 (0.007) | 16.27 (0.007) | |||||||||||
| G magnitude | 16.00 (0.003) | 16.02 | 16.00 | 16.00 (0.003) | 16.02 | ||||||||
| BP magnitude | 16.08 (0.003) | 16.08 | 16.08 | ||||||||||
| RP magnitude | 15.84 (0.003) | 15.85 | 15.85 | ||||||||||
| Pan g magnitude | 16.06 (0.003) | 16.06 (0.003) | |||||||||||
| Pan r magnitude | 16.08 (0.001) | 16.08 (0.001) | |||||||||||
| Pan i magnitude | 16.15 (0.002) | 16.15 (0.002) | |||||||||||
| Pan z magnitude | 16.29 (0.005) | 16.29 (0.004) | |||||||||||
| Pan y magnitude | 16.36 (0.01) | 16.36 (0.02) | |||||||||||
| 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.