All names: J0730+1703, SDSS J073032.89+170356.9, Gaia EDR3 3169222935694491904, SDSS J073032.90+170357.1, EQ J0730+1703, GALEX J073032.7+170356, Gaia DR3 3169222935694491904, USNO-B1.0 1070-00159785, Gaia DR2 3169222935694491904
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Gianninas et al. 2014 | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 30 32.89 (0.5) | 07 30 32.90 | 07 30 32.89 (0.6) | 07 30 32.90 (0.5) | 07 30 32.90 | ||||
| Declination | 17 03 57.07 (0.3) | 17 03 56.94 | 17 03 57.07 (0.5) | 17 03 57.09 (0.3) | 17 03 57.07 | ||||
| Spectral type | DA | DAH | DAH | ||||||
| Effective temperature | [K] | 12030.0 (220) | 10118.0 (165) | ||||||
| log(g) | [cgs] | 6.30 (0.05) | 6.19 (0.2) | ||||||
| Mass | [M☉] | 0.183 | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | 1.0030 (0.2) | |||||||
| 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] | 0.75 (0.5) | -0.04 (0.8) | 0.75 (0.5) | |||||
| Distance | [pc] | 1329.84 (810) | 1921.00 (261) | 1329.79 (810) | |||||
| Composition | H | ||||||||
| Proper motion (right ascension) | [mas/yr] | -5.589667696 (0.5) | -6.861356416 (1) | -5.59 (0.5) | |||||
| Proper motion (declination) | [mas/yr] | -1.168112663 (0.4) | -3.099997379 (1) | -1.168 (0.4) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | WDMS | ||||||||
| B magnitude | 20.00 | ||||||||
| V magnitude | |||||||||
| R magnitude | 20.10 | ||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 21.12 (0.1) | 21.12 (0.1) | 21.01 (0.1) | ||||||
| g magnitude | 20.06 (0.02) | 20.06 (0.02) | 20.00 (0.02) | ||||||
| r magnitude | 20.12 (0.02) | 20.12 (0.02) | 20.06 (0.02) | ||||||
| i magnitude | 20.20 (0.04) | 20.20 (0.04) | 20.10 (0.04) | ||||||
| z magnitude | 20.30 (0.1) | 20.30 (0.1) | 20.38 (0.2) | ||||||
| G magnitude | 20.02 (0.08) | 20.06 | 20.02 (0.007) | ||||||
| BP magnitude | 20.18 (0.08) | 19.88 | |||||||
| RP magnitude | 19.95 (0.1) | 19.74 | |||||||
| Pan g magnitude | 20.00 (0.01) | ||||||||
| Pan r magnitude | 20.03 (0.02) | ||||||||
| Pan i magnitude | 20.13 (0.009) | ||||||||
| Pan z magnitude | 20.29 (0.04) | ||||||||
| Pan y magnitude | 20.22 (0.1) | ||||||||
| E(B-V) | 0.052 | ||||||||
* 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.