All names: WIRED J081716.98+054223.6, WISE J081716.98+054223.6, [SGR2010] J0817+0542, Gaia EDR3 3096386887422866816, Gaia DR3 3096386887422866816, [HHD2009] SDSS J0817+0542, WISEA J081716.98+054223.7, GALEX J081716.9+054223, 2MASS J08171698+0542231, TIC 455148947, SDSS J081716.90+054223.6, WD 0814+058, SDSS J081716.98+054223.6, SDSS J081716.98+054223.7
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | 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 17 16.98 (3) | 08 17 16.98 | 08 17 16.98 | 08 17 16.98 (3) | 08 17 16.99 | 08 17 16.34 | 08 17 16.98 | |||||
| Declination | 05 42 23.61 (3) | 05 42 23.68 | 05 42 23.62 | 05 42 23.61 (3) | 05 42 23.67 | 05 42 21.96 | 05 42 23.67 | |||||
| Spectral type | DA+M | DA+M | DA | DA+dM | DA+M | DA d | DA+M | |||||
| Effective temperature | [K] | 35402.0 (1228) | 38494.0 (2436) | 37500.0 (1900) | 7309.0 (56) | 6936.0 (63) | ||||||
| log(g) | [cgs] | 7.94 (0.2) | 7.93 (0.3) | 8.03 (0.2) | 8.76 (0.1) | 7.89 (0.2) | ||||||
| Mass | [M☉] | 0.63 (0.1) | 0.647 (0.1) | 0.68 (0.1) | ||||||||
| log(Luminosity) | [L☉] | -0.56 (0.1) | ||||||||||
| Cooling age | [Gyr] | 0.0052 (0.0006) | 0.0062 | |||||||||
| 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] | 236.00 (25) | ||||||||||
| Composition | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 4.0 (3) | 5.9 | |||||||||
| Proper motion (declination) | [mas/yr] | 6.0 (3) | 7.9 | |||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | WDMS | WDMS | |||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 16.98 (0.2) | |||||||||||
| H magnitude | 16.30 (0.2) | |||||||||||
| K magnitude | 16.11 (0.4) | |||||||||||
| u magnitude | 18.69 (0.02) | 18.73 | 18.69 (0.02) | 18.73 (0.02) | 18.73 | 18.72 (0.02) | ||||||
| g magnitude | 18.89 (0.009) | 18.94 | 18.89 (0.009) | 18.94 (0.02) | 18.94 | 18.94 (0.02) | ||||||
| r magnitude | 18.85 (0.01) | 18.89 | 18.85 (0.01) | 18.89 (0.01) | 18.89 | 18.89 (0.01) | ||||||
| i magnitude | 18.36 (0.009) | 18.41 | 18.36 (0.009) | 18.41 (0.01) | 18.41 | 18.40 (0.01) | ||||||
| z magnitude | 17.95 (0.02) | 17.97 | 17.95 (0.02) | 17.97 (0.02) | 17.97 | 17.97 (0.02) | ||||||
| G magnitude | 18.88 (0.03) | 18.88 (0.02) | ||||||||||
| BP magnitude | 18.87 (0.03) | |||||||||||
| RP magnitude | 18.00 (0.03) | |||||||||||
| Pan g magnitude | 18.94 (0.005) | |||||||||||
| Pan r magnitude | 18.88 (0.01) | |||||||||||
| Pan i magnitude | 18.41 (0.005) | |||||||||||
| Pan z magnitude | 18.10 (0.005) | |||||||||||
| Pan y magnitude | 17.92 (0.01) | |||||||||||
| E(B-V) | 0.013 | |||||||||||
* 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.