All names: WD 0915+551, GALEX J091849.5+545602, SDSS J091849.54+545602.1, 2MASS J09184954+5456018, TIC 137670894, SDSS J091849.56+545601.8, Gaia DR3 1023298846153772288, WIRED J091849.55+545601.8, SDSS J091849.55+545601.8, Gaia DR2 1023298846153772288, SDSS J091849.54+545601.8, [HHD2009] SDSS J0918+5456, Gaia EDR3 1023298846153772288
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 18 49.54 (0.1) | 09 18 49.55 | 09 18 49.54 (0.3) | 09 18 49.55 | 09 18 49.55 (0.1) | 09 18 49.55 | 09 18 49.10 | 09 18 49.56 | |||
| Declination | 54 56 01.95 (0.1) | 54 56 01.85 | 54 56 01.94 (0.3) | 54 56 01.79 | 54 56 01.88 (0.1) | 54 56 01.85 | 54 55 57.00 | 54 56 01.82 | |||
| Spectral type | DA+M | DA+dM | DA+M | DA+M | DA+M | ||||||
| Effective temperature | [K] | 32972.0 (746) | 6300.0 (1) | 6300.0 (3) | |||||||
| log(g) | [cgs] | 7.60 (0.2) | 7.92 (0.1) | 5.01 (0.02) | |||||||
| Mass | [M☉] | 0.48 (0.07) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.60 (0.2) | 1.67 (0.4) | 1.60 (0.2) | |||||||
| Distance | [pc] | 623.56 (63) | 598.72 (150) | 623.56 (63) | |||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -7.863059167 (0.1) | -8.449844004 (0.5) | -7.863 (0.1) | -3.5 | ||||||
| Proper motion (declination) | [mas/yr] | 3.963860963 (0.2) | 5.680480046 (0.7) | 3.964 (0.2) | 4.8 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | yes | WDMS | |||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.49 (0.04) | ||||||||||
| H magnitude | 14.74 (0.05) | ||||||||||
| K magnitude | 14.51 (0.07) | ||||||||||
| u magnitude | 18.47 (0.02) | 18.45 | 18.43 (0.02) | 18.45 (0.03) | 18.43 | 18.48 (0.03) | |||||
| g magnitude | 18.21 (0.006) | 18.29 | 18.22 (0.006) | 18.29 (0.01) | 18.29 | 18.30 (0.01) | |||||
| r magnitude | 17.53 (0.005) | 17.58 | 17.54 (0.005) | 17.58 (0.02) | 17.58 | 17.60 (0.02) | |||||
| i magnitude | 16.96 (0.005) | 16.97 | 16.96 (0.005) | 16.97 (0.02) | 16.96 | 16.99 (0.02) | |||||
| z magnitude | 16.58 (0.009) | 16.59 | 16.58 (0.01) | 16.59 (0.02) | 16.57 | 16.61 (0.02) | |||||
| G magnitude | 17.68 (0.01) | 17.61 | 17.68 (0.004) | ||||||||
| BP magnitude | 18.01 (0.01) | 18.00 | |||||||||
| RP magnitude | 16.62 (0.005) | 16.62 | |||||||||
| Pan g magnitude | 18.21 (0.007) | ||||||||||
| Pan r magnitude | 17.56 (0.007) | ||||||||||
| Pan i magnitude | 17.00 (0.005) | ||||||||||
| Pan z magnitude | 16.72 (0.006) | ||||||||||
| Pan y magnitude | 16.57 (0.008) | ||||||||||
| 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.