All names: [SGR2010] J1555+2444, SDSS J155502.00+244422.1, WIRED J155501.99+244422.0, GALEX J155502.0+244421, WD 1552+248, SDSS J155502.00+244422.0, TIC 284760803, [BGK2006] J155502.00+244422.1, [HHD2009] SDSS J1555+2444, SDSS J155501.99+244422.0, Gaia DR3 1219552974402511104, 2MASS J15550198+2444220, EQ J1555+2444, Gaia DR2 1219552974402511104, Gaia EDR3 1219552974402511104
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 55 01.99 (0.03) | 15 55 02.00 | 15 55 01.99 (0.04) | 15 55 01.99 | 15 55 02.00 (0.03) | 15 55 01.44 | 15 55 02.00 | |||
| Declination | 24 44 21.97 (0.04) | 24 44 22.04 | 24 44 21.98 (0.05) | 24 44 21.98 | 24 44 22.12 (0.04) | 24 44 16.44 | 24 44 22.07 | |||
| Spectral type | DA+M | DA+M | DA2.4 | DA+M | ||||||
| Effective temperature | [K] | 17304.0 (155) | 17482.0 (146) | |||||||
| log(g) | [cgs] | 6.13 (0.04) | 6.04 (0.03) | |||||||
| Mass | [M☉] | 0.08 (0.008) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 1.40 (0.06) | 1.48 (0.08) | 1.40 (0.06) | ||||||
| Distance | [pc] | 714.33 (30) | 676.23 (37) | 384.00 (76) | 714.34 (30) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -13.52016366 (0.05) | -13.58280395 (0.1) | -13.52 (0.05) | ||||||
| Proper motion (declination) | [mas/yr] | -9.143643346 (0.06) | -9.090573378 (0.1) | -9.144 (0.06) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | yes | WDMS | |||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 15.67 (0.07) | |||||||||
| H magnitude | 15.25 (0.09) | |||||||||
| K magnitude | 15.13 (0.1) | |||||||||
| u magnitude | 16.52 (0.007) | 16.52 | 16.52 (0.007) | 16.51 | 16.53 (0.01) | |||||
| g magnitude | 16.21 (0.004) | 16.25 | 16.21 (0.004) | 16.24 | 16.24 (0.01) | |||||
| r magnitude | 16.51 (0.005) | 16.52 | 16.52 (0.005) | 16.52 | 16.53 (0.01) | |||||
| i magnitude | 16.58 (0.005) | 16.56 | 16.58 (0.005) | 16.56 | 16.57 (0.02) | |||||
| z magnitude | 16.54 (0.009) | 16.56 | 16.54 (0.009) | 16.56 | 16.55 (0.02) | |||||
| G magnitude | 16.34 (0.002) | 16.35 | 16.34 (0.003) | |||||||
| BP magnitude | 16.34 (0.002) | 16.31 | ||||||||
| RP magnitude | 16.24 (0.003) | 16.25 | ||||||||
| Pan g magnitude | 16.26 (0.006) | |||||||||
| Pan r magnitude | 16.52 (0.002) | |||||||||
| Pan i magnitude | 16.61 (0.002) | |||||||||
| Pan z magnitude | 16.59 (0.003) | |||||||||
| Pan y magnitude | 16.54 (0.004) | |||||||||
| E(B-V) | 0.048 | |||||||||
* 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.