All names: SDSS J154927.23+480228.7, WDJ154927.18+480229.07, WD 1547+481, SDSS J154927.20+480228.7, PSO J237.3639+48.0408, Gaia DR3 1401366366041668224, PM J15494+4802, Gaia EDR3 1401366366041668224, Gaia DR2 1401366366041668224, LSPM J1549+4802, TIC 286901614, J1549+4802, 15494+4802, SDSS J154927.19+480228.9, USNO-B1.0 1380-00299775, GALEX J154927.2+480228, WIRED J154927.22+480228.7, 2MASS J15492716+4802294
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | Blouin et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Limoges et al. 2015 | Sayres et al. 2012 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 49 27.36 (0.05) | 15 49 27.19 | 15 49 27.35 (0.06) | 15 49 27.16 | 15 49 27.36 | 15 49 27.18 (0.05) | 15 49 27.35 | 15 49 27.17 | 15 49 27.23 | |||||||||
| Declination | 48 02 26.88 (0.05) | 48 02 28.95 | 48 02 26.95 (0.07) | 48 02 29.50 | 48 02 26.88 | 48 02 29.08 (0.05) | 48 02 26.95 | 48 02 26.88 | 48 02 28.73 | |||||||||
| Spectral type | DC | DC | DC | DC | DC | DC | DC | DC | DC | DC | ||||||||
| Effective temperature | [K] | 6253.0 (28) | 6370.0 (120) | 6685.0 | 6431.0 | 6730.0 (125) | 6780.0 (40) | 6080.0 (66) | 6300.0 (4) | |||||||||
| log(g) | [cgs] | 8.06 (0.008) | 8.18 (0.04) | 8.30 | 8.19 | 8.00 (0) | 8.10 (0.01) | 10.00 (0.003) | ||||||||||
| Mass | [M☉] | 0.613 (0.008) | 0.684 (0.03) | 0.785 | 0.692 | 0.57 (0.1) | 0.632 (0.01) | |||||||||||
| log(Luminosity) | [L☉] | -3.54 | ||||||||||||||||
| Cooling age | [Gyr] | 2.4600 | 3.0590 (0.3) | 3.2700 | 3.0530 | |||||||||||||
| log(H/He) | -3.2 | |||||||||||||||||
| 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] | 23.81 (0.06) | 23.85 (0.07) | 23.85 (0.07) | 23.85 (0.07) | 23.81 | 23.81 (0.06) | 23.85 (0.07) | ||||||||||
| Distance | [pc] | 42.00 (0.1) | 41.93 (0.1) | 41.94 (0.1) | 41.93 (0.1) | 52.00 (6) | 51.90 | 42.00 | 42.00 (0.1) | 41.93 (0.1) | ||||||||
| Composition | He | He | He | He | ||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 109.1858723 (0.06) | 109.1178536 (0.1) | 109.186 (0.06) | 109.118 | |||||||||||||
| Proper motion (declination) | [mas/yr] | -137.1255186 (0.07) | -137.0595717 (0.1) | -137.126 (0.07) | -137.06 | |||||||||||||
| Variability | ||||||||||||||||||
| Magnetic | ||||||||||||||||||
| Bd | [MG] | |||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||
| Binarity | ||||||||||||||||||
| B magnitude | 17.00 | |||||||||||||||||
| V magnitude | ||||||||||||||||||
| R magnitude | 16.90 | |||||||||||||||||
| I magnitude | ||||||||||||||||||
| J magnitude | 16.44 (0.01) | 16.63 (0.1) | 16.63 | 16.63 (0.1) | 16.63 (0.1) | |||||||||||||
| H magnitude | 15.85 (0.03) | 15.85 | 15.85 | |||||||||||||||
| K magnitude | 16.75 (0.03) | 16.75 | 16.75 | |||||||||||||||
| u magnitude | 18.01 (0.01) | 18.00 (0.01) | 18.03 | 18.05 (0.01) | 18.01 (0.01) | 18.04 (0.01) | 18.05 (0.02) | |||||||||||
| g magnitude | 17.37 (0.005) | 17.41 | 17.40 (0.005) | 17.38 (0.007) | 17.41 (0.005) | 17.41 (0.02) | ||||||||||||
| r magnitude | 17.16 (0.005) | 17.16 | (0.005) | 17.17 (0.004) | 17.15 (0.005) | 17.15 (0.02) | ||||||||||||
| i magnitude | 17.09 (0.005) | 17.09 | 17.09 (0.006) | 17.11 (0.003) | 17.09 (0.006) | 17.08 (0.01) | ||||||||||||
| z magnitude | 17.13 (0.01) | 17.11 | 17.12 (0.01) | 17.14 (0.005) | 17.13 (0.01) | 17.13 (0.03) | ||||||||||||
| G magnitude | 17.15 (0.006) | 17.16 | 17.15 | 17.15 (0.003) | 17.16 | |||||||||||||
| BP magnitude | 17.37 (0.006) | 17.36 | 17.36 | |||||||||||||||
| RP magnitude | 16.78 (0.006) | 16.78 | 16.78 | |||||||||||||||
| Pan g magnitude | 17.38 (0.007) | 17.38 (0.007) | 17.38 (0.007) | |||||||||||||||
| Pan r magnitude | 17.17 (0.004) | 17.17 (0.004) | 17.17 (0.004) | |||||||||||||||
| Pan i magnitude | 17.11 (0.003) | 17.11 (0.003) | 17.11 (0.003) | |||||||||||||||
| Pan z magnitude | 17.14 (0.004) | 17.14 (0.005) | 17.14 (0.005) | |||||||||||||||
| Pan y magnitude | 17.18 (0.02) | 17.18 (0.02) | 17.18 (0.02) | |||||||||||||||
| E(B-V) | 0.005 | |||||||||||||||||
* 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.