All names: Gaia EDR3 2553935752048977792, UCAC4 469-000710, GALEX J003047.8+034700, J0030+0347, WD 0028+035, TIC 257305371, PB 6002, 2MASS J00304775+0346580, Gaia DR2 2553935752048977792, Gaia DR3 2553935752048977792, SDSS J003047.84+034700.0, WDJ003047.74+034657.93
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Tremblay et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 30 47.95 (0.04) | 00 30 47.94 (0.07) | 00 30 47.94 | 00 30 47.95 | 00 30 47.74 (0.04) | 00 30 47.94 | ||||||
| Declination | 03 47 01.97 (0.03) | 03 47 01.84 (0.04) | 03 47 01.84 | 03 47 01.97 | 03 46 57.93 (0.03) | 03 47 01.84 | ||||||
| Spectral type | DC | DC | DC | DC | DC | DC | ||||||
| Effective temperature | [K] | 6418.0 (47) | 6132.0 (21) | 6392.7 (26) | 6390.0 (30) | 5932.0 (43) | ||||||
| log(g) | [cgs] | 8.07 (0.02) | 7.89 (0.007) | 8.07 (0.01) | 8.07 (0.02) | 7.91 (0.01) | ||||||
| Mass | [M☉] | 0.614 (0.01) | 0.51 (0.005) | 0.52 (0.009) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 2.0000 | ||||||||||
| log(H/He) | -3.0 | |||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| log(N/He) | ||||||||||||
| log(O/He) | ||||||||||||
| log(Na/He) | ||||||||||||
| log(Mg/He) | ||||||||||||
| log(Al/He) | ||||||||||||
| log(Si/He) | ||||||||||||
| log(P/He) | ||||||||||||
| log(S/He) | ||||||||||||
| log(Cl/He) | ||||||||||||
| log(Sc/He) | ||||||||||||
| log(Ti/He) | ||||||||||||
| log(V/He) | ||||||||||||
| log(Cr/He) | ||||||||||||
| log(Mn/He) | ||||||||||||
| log(Fe/He) | ||||||||||||
| log(Co/He) | ||||||||||||
| log(Ni/He) | ||||||||||||
| log(Cu/He) | ||||||||||||
| log(Zn/He) | ||||||||||||
| log(Ga/He) | ||||||||||||
| log(Ge/He) | ||||||||||||
| log(Sr/He) | ||||||||||||
| Parallax | [mas] | 36.00 (0.05) | 36.00 (0.05) | 36.00 (0.05) | 36.08 (0.07) | 36.08 (0.07) | 36.00 | 36.00 (0.05) | 36.08 (0.07) | |||
| Distance | [pc] | 27.78 (0.04) | 27.78 (0.04) | 27.78 (0.04) | 27.72 (0.06) | 27.72 (0.06) | 27.78 | 27.78 (0.04) | 27.72 (0.06) | |||
| Composition | He | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 195.0833992 (0.07) | 195.2987784 (0.2) | 195.083 (0.07) | 195.2987784 | |||||||
| Proper motion (declination) | [mas/yr] | 252.1175159 (0.04) | 252.1721516 (0.09) | 252.118 (0.04) | 252.1721516 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.47 (0.07) | 15.47 (0.07) | ||||||||||
| H magnitude | 15.24 (0.1) | 15.24 (0.1) | ||||||||||
| K magnitude | 15.16 (0.1) | 15.16 (0.1) | ||||||||||
| u magnitude | 17.00 (0.008) | 17.00 (0.008) | 17.00 (0.008) | |||||||||
| g magnitude | 16.38 (0.004) | 16.38 (0.004) | ||||||||||
| r magnitude | 16.10 (0.004) | 16.10 (0.004) | ||||||||||
| i magnitude | 16.06 (0.004) | 16.06 (0.004) | ||||||||||
| z magnitude | 16.04 (0.007) | 16.04 (0.007) | ||||||||||
| G magnitude | 16.09 (0.004) | 16.11 | 16.11 | 16.09 | 16.09 (0.003) | 16.11 | ||||||
| BP magnitude | 16.32 (0.004) | 16.32 | 16.32 | |||||||||
| RP magnitude | 15.71 (0.002) | 15.72 | 15.72 | |||||||||
| Pan g magnitude | 16.33 (0.007) | 16.33 (0.007) | ||||||||||
| Pan r magnitude | 16.11 (0.002) | 16.11 (0.002) | ||||||||||
| Pan i magnitude | 16.05 (0.003) | 16.05 (0.003) | ||||||||||
| Pan z magnitude | 16.05 (0.003) | 16.05 (0.003) | ||||||||||
| Pan y magnitude | 16.09 (0.009) | 16.09 (0.009) | ||||||||||
| 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.