All names: 2MASS J09162130+2540291, NLTT 21339, LSPM J0916+2540, TIC 149368781, Gaia DR2 687914432080614528, SDSS J091621.36+254028.4, SDSS J091621.35+254028.3, USNO-B1.0 1156-00162974, WD 0913+258, Gaia EDR3 687914432080614528, WDJ091621.31+254029.10, LP 369-22, Gaia DR3 687914432080614528, J0916+2540
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | Blouin 2020 | Coutu et al. 2019 | Gaia DR2 | Hollands et al. 2017 | Stilism | Koester et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 16 21.49 (0.1) | 09 16 21.36 | 09 16 21.31 | 09 16 21.49 (0.1) | 09 16 21.49 | 09 16 21.31 (0.1) | 09 16 21.49 | 09 16 21.02 | ||||||||
| Declination | 25 40 26.33 (0.06) | 25 40 28.36 | 25 40 29.10 | 25 40 26.41 (0.09) | 25 40 26.33 | 25 40 29.10 (0.06) | 25 40 26.41 | 25 40 26.76 | ||||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ9.2 | DZ | |||||||
| Effective temperature | [K] | 5812.0 (13) | 5497.0 (81) | 5652.0 (57) | 5378.0 (70) | 5500.0 | 5106.0 (33) | |||||||||
| log(g) | [cgs] | 8.20 (0.01) | 8.07 (0.04) | 8.13 | 8.00 (0) | 7.78 (0.02) | ||||||||||
| Mass | [M☉] | 0.698 (0.009) | 0.612 (0.02) | 0.6493 | 0.444 (0.01) | |||||||||||
| log(Luminosity) | [L☉] | |||||||||||||||
| Cooling age | [Gyr] | 4.6800 | 4.5300 | 5.3000 | ||||||||||||
| log(H/He) | -4.0 | <-3.0 | ||||||||||||||
| log(C/He) | ||||||||||||||||
| log(Ca/He) | -7.2 | -7.5 (0.2) | -7.6396 (0.04) | -7.48 | -7.6 | |||||||||||
| log(Ca/H) | ||||||||||||||||
| log(N/He) | ||||||||||||||||
| log(O/He) | ||||||||||||||||
| log(Na/He) | -9.32 | -9.3 | ||||||||||||||
| log(Mg/He) | -6.5 (0.2) | -6.83 | -6.9 | |||||||||||||
| log(Al/He) | ||||||||||||||||
| log(Si/He) | ||||||||||||||||
| log(P/He) | ||||||||||||||||
| log(S/He) | ||||||||||||||||
| log(Cl/He) | ||||||||||||||||
| log(Sc/He) | ||||||||||||||||
| log(Ti/He) | -8.75 | -9.0 | ||||||||||||||
| log(V/He) | ||||||||||||||||
| log(Cr/He) | -8.9 | -8.9 | ||||||||||||||
| log(Mn/He) | ||||||||||||||||
| log(Fe/He) | -7.2 (0.2) | -7.09 | -7.1 | |||||||||||||
| log(Co/He) | ||||||||||||||||
| log(Ni/He) | ||||||||||||||||
| log(Cu/He) | ||||||||||||||||
| log(Zn/He) | ||||||||||||||||
| log(Ga/He) | ||||||||||||||||
| log(Ge/He) | ||||||||||||||||
| log(Sr/He) | ||||||||||||||||
| Parallax | [mas] | 21.44 (0.1) | 21.61 (0.2) | 21.61 | 21.61 (0.2) | 21.44 | 21.44 (0.1) | 21.61 (0.2) | ||||||||
| Distance | [pc] | 46.63 (0.3) | 46.27 (0.4) | 46.22 (0.4) | 46.28 (0.4) | 46.28 (0.4) | 43.40 (5) | 46.63 | 46.63 (0.3) | 46.28 (0.4) | ||||||
| Composition | He | He | He | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 158.2367732 (0.1) | 158.6039406 (0.2) | 158.237 (0.1) | 158.6039406 | |||||||||||
| Proper motion (declination) | [mas/yr] | -173.4729594 (0.09) | -173.3699736 (0.2) | -173.473 (0.09) | -173.3699736 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | 18.30 | |||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | 17.60 | |||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 16.84 (0.02) | 16.52 (0.1) | ||||||||||||||
| H magnitude | ||||||||||||||||
| K magnitude | ||||||||||||||||
| u magnitude | 21.28 (0.1) | 21.36 (0.1) | 21.26 (0.09) | 21.26 (0.09) | 21.26 (0.1) | 21.28 (0.1) | 21.28 (0.1) | 21.25 | ||||||||
| g magnitude | 18.37 (0.007) | 18.36 (0.01) | 18.36 (0.01) | 18.35 (0.01) | 18.37 (0.007) | 18.37 (0.007) | 18.34 | |||||||||
| r magnitude | 17.47 (0.006) | 17.47 (0.02) | 17.47 (0.02) | 17.47 (0.02) | 17.47 (0.006) | 17.47 (0.006) | 17.47 | |||||||||
| i magnitude | 17.39 (0.007) | 17.39 (0.02) | 17.39 (0.02) | 17.38 (0.02) | 17.39 (0.007) | 17.39 (0.007) | 17.38 | |||||||||
| z magnitude | 17.52 (0.02) | 17.53 (0.02) | 17.53 (0.02) | 17.53 (0.02) | 17.52 (0.02) | 17.52 (0.02) | 17.52 | |||||||||
| G magnitude | 17.64 (0.02) | 17.65 | 17.64 | 17.64 (0.003) | 17.65 | |||||||||||
| BP magnitude | 18.04 (0.02) | 18.12 | 18.12 | |||||||||||||
| RP magnitude | 17.10 (0.01) | 17.07 | 17.07 | |||||||||||||
| Pan g magnitude | 18.15 (0.008) | 18.15 (0.009) | ||||||||||||||
| Pan r magnitude | 17.48 (0.004) | 17.48 (0.004) | ||||||||||||||
| Pan i magnitude | 17.40 (0.005) | 17.40 (0.004) | ||||||||||||||
| Pan z magnitude | 17.58 (0.004) | 17.58 (0.004) | ||||||||||||||
| Pan y magnitude | 17.50 (0.01) | 17.50 (0.01) | ||||||||||||||
| E(B-V) | 0.001 | |||||||||||||||
* 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.