All names: GALEX J084018.2+265602, Gaia DR2 703414728533290240, [HHD2009] SDSS J0840+2656, Gaia EDR3 703414732830907520, SDSS J084018.25+265603.1, WD 0837+271, WIRED J084018.24+265603.1, SDSS J084018.24+265603.0, Gaia DR3 703414732830907520, TIC 117221223, SDSS J084018.24+265603.1, 2MASS J08401823+2656035
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 40 18.24 (1) | 08 40 18.24 | 08 40 18.24 (1) | 08 40 18.24 | 08 40 18.24 (1) | 08 40 18.25 | 08 40 17.95 | 08 40 18.25 | ||||
| Declination | 26 56 02.88 (0.8) | 26 56 03.10 | 26 56 02.91 (0.9) | 26 56 03.08 | 26 56 02.88 (0.8) | 26 56 03.12 | 26 56 02.04 | 26 56 03.12 | ||||
| Spectral type | DA+M | DA | DA+M | DA+M | DA d | DA+M | ||||||
| Effective temperature | [K] | 28718.0 (345) | 29140.0 (400) | 8544.0 (49) | 8397.0 (42) | |||||||
| log(g) | [cgs] | 8.01 (0.07) | 7.96 (0.08) | 8.88 (0.09) | 8.49 (0.05) | |||||||
| Mass | [M☉] | 0.65 (0.04) | 0.62 (0.04) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.0107 | ||||||||||
| 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] | |||||||||||
| Distance | [pc] | 959.00 (437) | ||||||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 3.0 (3) | 4.1 | |||||||||
| Proper motion (declination) | [mas/yr] | -19.0 (3) | -15.9 | |||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | WDMS | WDMS | |||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.74 (0.005) | |||||||||||
| H magnitude | 15.26 (0.08) | |||||||||||
| K magnitude | 15.01 (0.1) | |||||||||||
| u magnitude | 17.70 (0.01) | 17.65 | 17.70 (0.01) | 17.65 (0.02) | 17.65 | 17.65 (0.02) | ||||||
| g magnitude | 17.84 (0.005) | 17.87 | 17.84 (0.005) | 17.86 (0.03) | 17.87 | 17.88 (0.03) | ||||||
| r magnitude | 18.06 (0.007) | 18.13 | 18.09 (0.007) | 18.13 (0.02) | 18.13 | 18.14 (0.02) | ||||||
| i magnitude | 17.64 (0.007) | 17.69 | 17.64 (0.006) | 17.69 (0.02) | 17.69 | 17.70 (0.02) | ||||||
| z magnitude | 17.09 (0.01) | 17.07 | 17.04 (0.01) | 17.07 (0.02) | 17.07 | 17.09 (0.02) | ||||||
| G magnitude | 18.09 (0.01) | 17.97 | 18.09 (0.006) | |||||||||
| BP magnitude | 17.91 (0.01) | 17.85 | ||||||||||
| RP magnitude | 17.17 (0.007) | 17.18 | ||||||||||
| Pan g magnitude | 17.88 (0.005) | |||||||||||
| Pan r magnitude | 18.10 (0.005) | |||||||||||
| Pan i magnitude | 17.71 (0.01) | |||||||||||
| Pan z magnitude | 17.23 (0.006) | |||||||||||
| Pan y magnitude | 16.96 (0.01) | |||||||||||
| E(B-V) | 0.025 | |||||||||||
* 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.