All names: Gaia EDR3 1193136971322193792, SDSS J155735.37+155817.2, SDSS J155735.37+155817.1, SDSS J155735.36+155817.1, Gaia DR3 1193136971322193792, SDSS J155735.38+155817.1, Gaia DR2 1193136971322193792, WIRED J155735.37+155817.2
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 57 35.40 (0.1) | 15 57 35.37 | 15 57 35.39 (0.1) | 15 57 35.37 | 15 57 35.37 (0.1) | 15 57 35.37 | ||||
| Declination | 15 58 17.21 (0.1) | 15 58 17.12 | 15 58 17.21 (0.1) | 15 58 17.22 | 15 58 17.26 (0.1) | 15 58 17.21 | ||||
| Spectral type | DA+M | DA+M | DA | DA+M | DA+MS | |||||
| Effective temperature | [K] | 45104.0 (922) | 43466.0 (956) | 46580.0 (818) | ||||||
| log(g) | [cgs] | 7.67 (0.08) | 7.79 (0.1) | 7.60 (0.06) | ||||||
| Mass | [M☉] | 0.53 (0.03) | 0.58 (0.04) | |||||||
| log(Luminosity) | [L☉] | 0.06 (0.07) | ||||||||
| Cooling age | [Gyr] | 0.0024 (0.0004) | ||||||||
| 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] | 1.41 (0.2) | 1.69 (0.2) | 1.41 (0.2) | ||||||
| Distance | [pc] | 708.50 (79) | 592.86 (67) | 699.00 (50) | 708.52 (79) | |||||
| Composition | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | 23.372621 (0.1) | 23.68449058 (0.2) | 23.373 (0.1) | ||||||
| Proper motion (declination) | [mas/yr] | -3.135419497 (0.1) | -2.779990488 (0.2) | -3.135 (0.1) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | WDMS | WDMS | |||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 17.32 (0.009) | 17.45 | 17.32 (0.009) | 17.45 (0.02) | ||||||
| g magnitude | 17.81 (0.006) | 17.93 | 17.81 (0.006) | 17.93 (0.03) | ||||||
| r magnitude | 18.30 (0.007) | 18.41 | 18.30 (0.007) | 18.41 (0.03) | ||||||
| i magnitude | 19.13 (0.02) | 19.17 | 19.13 (0.01) | 19.17 (0.1) | ||||||
| z magnitude | 19.25 (0.05) | 19.87 | 19.25 (0.05) | 19.87 (0.5) | ||||||
| G magnitude | 18.03 (0.01) | 18.05 | 18.03 (0.004) | |||||||
| BP magnitude | 17.81 (0.01) | 17.68 | ||||||||
| RP magnitude | 17.59 (0.03) | 17.56 | ||||||||
| Pan g magnitude | ||||||||||
| Pan r magnitude | ||||||||||
| Pan i magnitude | ||||||||||
| Pan z magnitude | ||||||||||
| Pan y magnitude | ||||||||||
| E(B-V) | 0.040 | |||||||||
* 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.