All names: Ton 320, UBV 8044, SDSS J082705.53+313008.2, Gaia DR2 708990321934310784, GALEX J082705.6+313008, GEN# +6.10070320, CSI+31-08238, UBV M 43138, LAMOST J082705.52+313008.2, PN G191.4+33.1, TK 1, PG 0823+317, SDSS J082705.53+313008.3, GALEX J082705.5+313008, TON 320, TIC 400728564, PG 0823+316, WIRED J082705.53+313008.3, PLX 2003.01, GALEX J082705.5+313009, WD 0823+316, 2MASS J08270553+3130085, GALEX J082705.5+313007, WD 0823+317, PN G191.4+33.0, Gaia EDR3 708990321934310784, Gaia DR3 708990321934310784
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Tremblay et al. 2011 | Liebert et al. 2005 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 27 05.52 (0.05) | 08 27 05.53 | 08 27 05.52 (0.06) | 08 27 05.53 (0.05) | 08 27 05.53 | 08 27 04.80 | 08 27 05.53 | |||||||
| Declination | 31 30 08.11 (0.04) | 31 30 08.29 | 31 30 08.12 (0.05) | 31 30 08.31 (0.04) | 31 30 08.27 | 31 30 05.76 | 31 30 08.34 | |||||||
| Spectral type | DAO | DA | DAO | DAO.7 | DAO | DA1 | DAO | |||||||
| Effective temperature | [K] | 74279.0 (1868) | 72510.0 (2128) | 78550.0 (2280) | 68850.0 (2074) | 85860.0 (1902) | 72938.0 (1372) | |||||||
| log(g) | [cgs] | 7.35 (0.06) | 7.76 (0.09) | 7.33 (0.08) | 7.68 (0.1) | 7.40 (0.07) | 7.37 (0.06) | |||||||
| Mass | [M☉] | 0.5 (0.02) | 0.64 (0.03) | 0.54 (0.02) | 0.61 (0.04) | |||||||||
| log(Luminosity) | [L☉] | 1.23 (0.07) | 0.85 | |||||||||||
| Cooling age | [Gyr] | 0.0001 | 0.0203 | 0.0009 | ||||||||||
| 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] | 1.81 (0.06) | 1.87 (0.08) | 1.81 (0.06) | 5.40 (9) | |||||||||
| Distance | [pc] | 551.17 (18) | 534.62 (23) | 340.00 | 342.00 | 551.18 (18) | 185.19 (309) | |||||||
| Composition | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -6.422796983 (0.06) | -6.474531198 (0.1) | -6.423 (0.06) | -0.8 | |||||||||
| Proper motion (declination) | [mas/yr] | -12.5289671 (0.04) | -12.77010558 (0.1) | -12.529 (0.04) | -11.4 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 15.38 (0.007) | |||||||||||||
| V magnitude | 15.74 | 15.72 (0.006) | ||||||||||||
| R magnitude | 15.89 (0.01) | |||||||||||||
| I magnitude | 16.11 (0.02) | |||||||||||||
| J magnitude | 16.59 (0.1) | |||||||||||||
| H magnitude | 15.96 (0.1) | |||||||||||||
| K magnitude | 15.73 (0.2) | |||||||||||||
| u magnitude | 14.91 (0.004) | 14.91 (0.004) | 14.93 (0.02) | 14.92 | 14.93 (0.02) | |||||||||
| g magnitude | 15.35 (0.004) | 15.35 (0.004) | 15.40 (0.008) | 15.39 | 15.38 (0.01) | |||||||||
| r magnitude | 15.94 (0.004) | 15.94 (0.004) | 15.97 (0.009) | 15.96 | 15.94 (0.01) | |||||||||
| i magnitude | 16.30 (0.005) | 16.30 (0.005) | 16.32 (0.01) | 16.31 | 16.30 (0.01) | |||||||||
| z magnitude | 16.69 (0.009) | 16.69 (0.009) | 16.72 (0.02) | 16.71 | 16.69 (0.02) | |||||||||
| G magnitude | 15.66 (0.003) | 15.68 | 15.66 (0.003) | |||||||||||
| BP magnitude | 15.48 (0.003) | 15.37 | ||||||||||||
| RP magnitude | 16.02 (0.004) | 16.01 | ||||||||||||
| Pan g magnitude | 15.46 (0.005) | |||||||||||||
| Pan r magnitude | 15.95 (0.002) | |||||||||||||
| Pan i magnitude | 16.35 (0.002) | |||||||||||||
| Pan z magnitude | 16.65 (0.002) | |||||||||||||
| Pan y magnitude | 16.83 (0.005) | |||||||||||||
| E(B-V) | 0.026 | |||||||||||||
* 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.