All names: USNO-B1.0 1240-00002507, PSO J001.8705+34.0618, LP 240-29, SDSS J000728.91+340341.4, WDJ000728.90+340339.69, NLTT 301, Gaia DR2 2875903332533220992, PM J00074+3403, 2MASS J00072887+3403400, Gaia DR3 2875903332533220992, LSPM J0007+3403, GALEX J000728.9+340340, 00074+3403, TIC 354537557, Gaia EDR3 2875903332533220992, J0007+3403
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 07 28.93 (0.06) | 00 07 28.93 (0.08) | 00 07 28.93 (0.08) | 00 07 28.93 | 00 07 28.90 (0.06) | 00 07 28.93 | ||||||||
| Declination | 34 03 42.88 (0.04) | 34 03 42.78 (0.04) | 34 03 42.78 (0.04) | 34 03 42.88 | 34 03 39.70 (0.04) | 34 03 42.78 | ||||||||
| Spectral type | DAP | DC | DC | DC | DC | DC | DA | DC | ||||||
| Effective temperature | [K] | 5917.0 (15) | 5646.0 (55) | 5567.0 (15) | 5617.0 (35) | 5545.0 (50) | 5830.0 (113) | 5938.0 (35) | ||||||
| log(g) | [cgs] | 8.34 (0.005) | 8.19 (0.03) | 8.16 (0.006) | 8.18 (0.02) | 8.15 (0.02) | 8.00 (0) | 8.34 (0.01) | ||||||
| Mass | [M☉] | 0.807 (0.005) | 0.69 (0.02) | 0.669 (0.006) | 0.666 (0.01) | 0.57 (0.1) | 0.808 (0.01) | |||||||
| log(Luminosity) | [L☉] | -3.79 | ||||||||||||
| Cooling age | [Gyr] | 5.2200 | 5.0210 (0.2) | |||||||||||
| 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] | 29.40 (0.08) | 29.40 (0.08) | 29.34 (0.1) | 29.34 (0.1) | 29.34 (0.1) | 29.34 (0.1) | 29.40 | 29.40 (0.08) | 29.34 (0.1) | ||||
| Distance | [pc] | 34.02 (0.1) | 34.01 (0.09) | 34.08 (0.1) | 34.09 (0.1) | 34.09 (0.1) | 34.09 (0.1) | 42.00 (5) | 34.02 | 34.02 (0.1) | 34.09 (0.1) | |||
| Composition | H | He | He | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | 20.62000075 (0.1) | 20.72867889 (0.2) | 21.0 | 20.62 (0.1) | 20.72867889 | ||||||||
| Proper motion (declination) | [mas/yr] | 198.9891573 (0.05) | 199.0651989 (0.07) | 197.0 | 198.989 (0.05) | 199.0651989 | ||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 17.70 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 17.30 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 16.32 (0.01) | 16.39 (0.1) | 16.39 | 16.39 (0.1) | ||||||||||
| H magnitude | 16.25 (0.2) | 16.25 (0.2) | 16.25 | 16.25 (0.2) | ||||||||||
| K magnitude | 15.83 (0.2) | 15.83 (0.2) | 15.83 | 15.83 (0.2) | ||||||||||
| u magnitude | 18.60 (0.02) | 18.57 (0.02) | 18.57 (0.02) | |||||||||||
| g magnitude | 17.60 (0.003) | 17.63 (0.005) | ||||||||||||
| r magnitude | 17.23 (0.004) | 17.21 (0.005) | ||||||||||||
| i magnitude | 17.12 (0.003) | 17.05 (0.006) | ||||||||||||
| z magnitude | 17.05 (0.002) | 17.00 (0.02) | ||||||||||||
| G magnitude | 17.24 (0.006) | 17.26 | 17.26 | 17.24 | 17.24 (0.003) | 17.26 | ||||||||
| BP magnitude | 17.57 (0.006) | 17.57 | 17.57 | |||||||||||
| RP magnitude | 16.74 (0.006) | 16.75 | 16.75 | |||||||||||
| Pan g magnitude | 17.60 (0.003) | 17.60 (0.003) | 17.61 (0.003) | |||||||||||
| Pan r magnitude | 17.23 (0.004) | 17.23 (0.004) | 17.23 (0.004) | |||||||||||
| Pan i magnitude | 17.12 (0.002) | 17.12 (0.003) | 17.12 (0.003) | |||||||||||
| Pan z magnitude | 17.05 (0.002) | 17.05 (0.002) | 17.05 (0.002) | |||||||||||
| Pan y magnitude | 17.08 (0.01) | 17.08 (0.008) | 17.08 (0.008) | |||||||||||
| 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.