All names: Gaia DR3 2301882675705225472, PSO J295.0109+83.8147, J1940+8348, 1946+837, PM J19401+8348, 19401+8348, Gaia DR2 2301882675705225472, TIC 235942759, LSR J1940+8348, LSPM J1940+8348, 2MASS J19400895+8348579, USNO-B1.0 1738-00034181, WDJ194008.62+834857.77, Gaia EDR3 2301882675705225472
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | Leggett et al. 2018 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 19 40 00.36 (0.1) | 19 40 00.62 (0.1) | 19 40 00.62 (0.1) | 19 40 00.36 | 19 40 08.62 (0.1) | 19 40 00.62 | ||||||||||
| Declination | 83 48 51.28 (0.1) | 83 48 51.48 (0.1) | 83 48 51.48 (0.1) | 83 48 51.28 | 83 48 57.78 (0.1) | 83 48 51.48 | ||||||||||
| Spectral type | DC | DC | DC | DC | DC10.5 | DC | DZ: | DC | ||||||||
| Effective temperature | [K] | 4805.0 (87) | 4774.0 (21) | 4653.6 (119) | 4740.0 (35) | 4748.0 (84) | 4786.0 | 4479.0 | 4840.0 (672) | 4674.0 (37) | ||||||
| log(g) | [cgs] | 8.31 (0.06) | 8.29 (0.01) | 8.22 (0.09) | 8.27 (0.02) | 8.22 (0.04) | 8.30 | 8.10 | 8.00 (0.2) | 8.29 (0.02) | ||||||
| Mass | [M☉] | 0.781 (0.04) | 0.77 (0.01) | 0.756 (0.01) | 0.717 (0.04) | 0.776 | 0.63 | 0.58 (0.1) | 0.759 (0.02) | |||||||
| log(Luminosity) | [L☉] | -4.11 | ||||||||||||||
| Cooling age | [Gyr] | 9.6800 | 8.8450 (0.1) | 7.9530 (0.3) | 8.8390 | 7.2580 | ||||||||||
| 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] | 27.99 (0.1) | 27.99 (0.1) | 27.94 (0.1) | 27.94 (0.2) | 27.94 (0.2) | 27.16 (0.4) | 27.94 (0.2) | 27.99 | 27.99 (0.1) | 27.94 (0.2) | |||||
| Distance | [pc] | 35.73 (0.1) | 35.73 (0.1) | 35.79 (0.2) | 35.79 (0.2) | 35.79 (0.2) | 36.82 (0.6) | 35.79 (0.2) | 38.80 (9) | 35.73 | 35.73 (0.1) | 35.79 (0.2) | ||||
| Composition | H | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -834.6046645 (0.1) | -834.345 (0.2) | -838.0 | -834.605 (0.1) | -834.3449387 | ||||||||||
| Proper motion (declination) | [mas/yr] | -406.2840543 (0.1) | -406.055 (0.3) | -417.0 | -406.284 (0.1) | -406.0547699 | ||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | 18.70 | |||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | 17.60 | |||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 16.65 (0.2) | 16.65 (0.2) | 16.65 | 16.65 (0.2) | ||||||||||||
| H magnitude | 16.24 (0.03) | 16.24 | ||||||||||||||
| K magnitude | 16.96 (0.03) | 16.96 | ||||||||||||||
| u magnitude | ||||||||||||||||
| g magnitude | 18.93 (0.005) | |||||||||||||||
| r magnitude | 18.25 (0.009) | |||||||||||||||
| i magnitude | 17.93 (0.002) | |||||||||||||||
| z magnitude | 17.86 (0.01) | |||||||||||||||
| G magnitude | 18.27 (0.02) | 18.29 | 18.29 | 18.27 | 18.27 (0.003) | 18.29 | ||||||||||
| BP magnitude | 18.85 (0.02) | 18.83 | 18.83 | |||||||||||||
| RP magnitude | 17.62 (0.01) | 17.59 | 17.59 | |||||||||||||
| Pan g magnitude | 18.93 (0.007) | 18.93 (0.007) | 18.93 (0.005) | |||||||||||||
| Pan r magnitude | 18.23 (0.01) | 18.23 (0.01) | 18.25 (0.009) | |||||||||||||
| Pan i magnitude | 17.95 (0.01) | 17.95 (0.01) | 17.93 (0.002) | |||||||||||||
| Pan z magnitude | 17.86 (0.006) | 17.86 (0.005) | 17.86 (0.01) | |||||||||||||
| Pan y magnitude | 17.77 (0.02) | 17.77 (0.03) | 17.80 (0.03) | |||||||||||||
| E(B-V) | 0.002 | |||||||||||||||
* 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.