WD J0914+1914
White dwarf WD J0914+1914 and its Neptune-like exoplanet | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h 14m 05.304s |
| Declination | +19° 14′ 12.28″ |
| Characteristics | |
| Evolutionary stage | white dwarf |
| Spectral type | DA |
| Astrometry | |
| Radial velocity (Rv) | −47 km/s |
| Proper motion (μ) | RA: −0.610 mas/yr Dec.: −13.446 mas/yr |
| Parallax (π) | 2.3396±0.2868 mas |
| Distance | approx. 1,400 ly (approx. 430 pc) |
| Details | |
| Mass | 0.56 ± 0.03 M☉ |
| Radius | 0.015 R☉ |
| Surface gravity (log g) | 7.85 ± 0.06 cgs |
| Temperature | 27743 ± 310 K |
| Age | 13.3 ± 0.5 Myr |
| Other designations | |
| SDSS J091405.30+191412.2, Gaia DR2 635879254021761024 | |
| Database references | |
| SIMBAD | data |
WD J0914+1914 is the first single white dwarf star found to have a giant planet orbiting it. Evidence of the giant planet was discovered by a team of astronomers from the UK, Chile and Germany.
The system was initially identified as a cataclysmic variable on the basis of weak H-alpha emissions in the spectrum by the Sloan Digital Sky Survey (SDSS). After closer inspection the team of astronomers discovered oxygen and sulfur lines in the SDSS spectra. The team then obtained spectroscopic follow-up observations with X-Shooter on ESO's Very Large Telescope. The spectra confirmed the previous observations by SDSS and found additional lines.