All names: SDSS J224038.38-093541.4, Gaia EDR3 2608898409880983808, SDSS J224038.37-093541.4, Gaia DR2 2608898409880983808, SBC9 3408, TIC 251021789, [SGR2010] J2240-0935, WIRED J224038.37-093541.4, 2MASS J22403836-0935412, Gaia DR3 2608898409880983808, SDSS J224038.37-093541.3, EPIC 206210269, [HHD2009] SDSS J2240-0935, WD 2238-098
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | 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 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 40 38.43 (0.08) | 22 40 38.38 | 22 40 38.43 (0.1) | 22 40 38.37 | 22 40 38.38 (0.08) | 22 40 38.38 | 22 40 37.73 | 22 40 38.38 | |||||
| Declination | -09 35 41.97 (0.07) | -09 35 41.41 | -09 35 41.95 (0.09) | -09 35 41.39 | -09 35 41.42 (0.07) | -09 35 41.41 | -09 35 36.96 | -09 35 41.40 | |||||
| Spectral type | DA+M | DA | DA+M | DA+M | DA dM | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 13300.0 (686) | 14010.0 (370) | 11449.0 (205) | 11468.0 (65) | ||||||||
| log(g) | [cgs] | 7.62 (0.1) | 7.71 (0.05) | 6.96 (0.09) | 7.02 (0.04) | ||||||||
| Mass | [M☉] | 0.41 (0.05) | 0.46 (0.02) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.1738 | |||||||||||
| 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] | 4.82 (0.1) | 4.84 (0.1) | 4.82 (0.1) | |||||||||
| Distance | [pc] | 207.28 (4) | 206.54 (5) | 207.28 (4) | |||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 54.3458487 (0.1) | 54.55347037 (0.2) | 54.346 (0.1) | 51.0 | ||||||||
| Proper motion (declination) | [mas/yr] | -33.99817742 (0.09) | -34.24257593 (0.2) | -33.998 (0.09) | -33.8 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | WDMS | WDMS | WDMS | WDMS | |||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 15.26 (0.04) | ||||||||||||
| H magnitude | 14.69 (0.06) | ||||||||||||
| K magnitude | 14.33 (0.09) | ||||||||||||
| u magnitude | 18.00 (0.01) | 18.02 | 18.01 (0.02) | 18.02 (0.02) | 18.02 | 18.01 (0.02) | |||||||
| g magnitude | 17.51 (0.005) | 17.55 | 17.52 (0.005) | 17.55 (0.01) | 17.55 | 17.54 (0.01) | |||||||
| r magnitude | 17.56 (0.006) | 17.57 | 17.55 (0.006) | 17.57 (0.01) | 17.57 | 17.55 (0.01) | |||||||
| i magnitude | 17.14 (0.006) | 17.15 | 17.14 (0.006) | 17.15 (0.01) | 17.15 | 17.14 (0.01) | |||||||
| z magnitude | 16.56 (0.009) | 16.57 | 16.55 (0.009) | 16.57 (0.02) | 16.57 | 16.54 (0.02) | |||||||
| G magnitude | 17.28 (0.01) | 17.29 | 17.28 (0.003) | ||||||||||
| BP magnitude | 17.60 (0.01) | 17.58 | |||||||||||
| RP magnitude | 16.71 (0.007) | 16.70 | |||||||||||
| Pan g magnitude | 17.51 (0.007) | ||||||||||||
| Pan r magnitude | 17.57 (0.003) | ||||||||||||
| Pan i magnitude | 17.16 (0.002) | ||||||||||||
| Pan z magnitude | 16.69 (0.02) | ||||||||||||
| Pan y magnitude | 16.44 (0.009) | ||||||||||||
| E(B-V) | 0.047 | ||||||||||||
* 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.