All names: SDSS J155205.60+433825.9, [HHD2009] SDSS J1552+4338, WIRED J155205.59+433825.8, GALEX J155205.5+433826, WD 1550+437, Gaia DR2 1396684954767921280, Gaia EDR3 1396684954767921280, Gaia DR3 1396684954767921280, SDSS J155205.59+433825.8
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | 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 | 15 52 05.61 (0.1) | 15 52 05.60 | 15 52 05.61 (0.2) | 15 52 05.59 | 15 52 05.60 (0.1) | 15 52 05.60 | 15 52 05.71 | 15 52 05.60 | |||||
| Declination | 43 38 25.85 (0.1) | 43 38 25.96 | 43 38 25.85 (0.2) | 43 38 25.80 | 43 38 25.96 (0.1) | 43 38 25.89 | 43 38 24.36 | 43 38 25.88 | |||||
| Spectral type | DA+M | DA+M | DA | DA+dM | DA+M | DA d | DA+M | ||||||
| Effective temperature | [K] | 33993.0 (659) | 35331.0 (1253) | 35650.0 (1270) | 8004.0 (57) | 7907.0 (72) | |||||||
| log(g) | [cgs] | 7.68 (0.1) | 7.75 (0.2) | 7.69 (0.2) | 8.98 (0.03) | 8.77 (0.1) | |||||||
| Mass | [M☉] | 0.51 (0.05) | 0.54 (0.1) | 0.52 (0.09) | |||||||||
| log(Luminosity) | [L☉] | -0.46 (0.09) | |||||||||||
| Cooling age | [Gyr] | 0.0054 (0.0009) | 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] | 1.05 (0.2) | 0.97 (0.2) | 1.05 (0.2) | |||||||||
| Distance | [pc] | 956.31 (147) | 1035.39 (243) | 956.30 (147) | |||||||||
| Composition | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 4.88150087 (0.2) | 5.186512883 (0.4) | 4.882 (0.2) | -3.8 | ||||||||
| Proper motion (declination) | [mas/yr] | -6.764140351 (0.2) | -6.97633583 (0.5) | -6.764 (0.2) | -7.5 | ||||||||
| 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 | 18.62 (0.02) | 18.63 | 18.62 (0.02) | 18.63 (0.02) | 18.63 | 18.62 (0.02) | |||||||
| g magnitude | 18.82 (0.008) | 18.86 | 18.84 (0.009) | 18.86 (0.02) | 18.86 | 18.84 (0.02) | |||||||
| r magnitude | 18.97 (0.01) | 18.99 | 18.99 (0.01) | 18.99 (0.02) | 18.99 | 18.97 (0.02) | |||||||
| i magnitude | 18.60 (0.01) | 18.59 | 18.57 (0.01) | 18.59 (0.01) | 18.59 | 18.57 (0.01) | |||||||
| z magnitude | 18.19 (0.03) | 18.24 | 18.28 (0.03) | 18.24 (0.04) | 18.24 | 18.22 (0.04) | |||||||
| G magnitude | 18.69 (0.02) | 18.71 | 18.69 (0.003) | ||||||||||
| BP magnitude | 18.87 (0.02) | 18.83 | |||||||||||
| RP magnitude | 18.24 (0.02) | 18.24 | |||||||||||
| Pan g magnitude | 18.86 (0.01) | ||||||||||||
| Pan r magnitude | 18.97 (0.007) | ||||||||||||
| Pan i magnitude | 18.61 (0.005) | ||||||||||||
| Pan z magnitude | 18.27 (0.01) | ||||||||||||
| Pan y magnitude | 18.15 (0.01) | ||||||||||||
| E(B-V) | 0.020 | ||||||||||||
* 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.