WASP-52
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 23h 13m 58.7576s[1] |
| Declination | 08° 45′ 40.5713″[1] |
| Apparent magnitude (V) | 12.0 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | K2V |
| Astrometry | |
| Radial velocity (Rv) | -26.604[1] km/s |
| Proper motion (μ) | RA: -6.942[1] mas/yr Dec.: -44.330[1] mas/yr |
| Parallax (π) | 5.7262±0.0134 mas[1] |
| Distance | 570 ± 1 ly (174.6 ± 0.4 pc) |
| Details[2] | |
| Mass | 0.87±0.03 M☉ |
| Radius | 0.79±0.02 R☉ |
| Surface gravity (log g) | 4.58±0.01[3] cgs |
| Temperature | 5000±100 K |
| Metallicity [Fe/H] | 0.03±0.12 dex |
| Rotation | 16±2 d[3] |
| Rotational velocity (v sin i) | 1.77+0.19 −0.20[4] km/s |
| Age | 10.7+1.9 −4.5 Gyr |
| Other designations | |
| Anadolu, Gaia EDR3 2666015878575546496, 2MASS J23135873+0845405[5] | |
| Database references | |
| SIMBAD | data |
WASP-52 is a K-type main-sequence star about 570 light-years away. The stars age is older than the Sun's at 10.7+1.9
−4.5 billion years. WASP-52 is is similar to Sun in fraction of heavy elements.[2]
The star has a prominent starspot activity, with the 3% to 14% of stellar surface covered by dark spots 575±150 K cooler than the rest of photosphere.[6]
The star was named Anadolu in 2019 by Turkish astronomers as part of the "nameexoworlds" contest.[7]
A multiplicity survey in 2015 did not detect any stellar companions to WASP-52.[8]
Planetary system
In 2012 a transiting hot Jupiter planet b was detected on a tight, circular orbit.[3] The planet was named Gokturk by Turkish astronomers in December 2019.[7]
Its equilibrium temperature is 1315±35 K.[3] The planetary orbit is well aligned with the equatorial plane of the star, misalignment been equal to 5.47+4.61
−4.21°.[4]
The transmission spectrum taken in 2020 has revealed the presence of H, Na and K and no high winds in planetary atmosphere,[9] although Na and K lines may be attributable to volcanically active moons of gas giant, not the planet itself.[10] The atmosphere have relatively low-lying clouds, indicating planet is not significantly enriched by heavy elements.[11] No signs of planetary atmosphere escaping to space were detected.[12]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Gokturk) | 0.459+0.022 −0.021 MJ |
0.02713+0.00031 −0.00032 |
1.7497835±0.0000011 | <0.092 | 85.35±0.20° | 1.27±0.03 RJ |
References
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets, 2017, arXiv:1704.00373
- ^ a b c d WASP-52b, WASP-58b, WASP-59b, and WASP-60b: four new transiting close-in giant planets, 2012, arXiv:1211.0810
- ^ a b Activity induced variation in spin-orbit angles as derived from Rossiter-McLaughlin measurements, 2018, arXiv:1809.01027
- ^ "WASP-52". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ Correcting for chromatic stellar activity effects in transits with multiband photometric monitoring: Application to WASP-52, 2020, arXiv:2007.00573
- ^ a b 'Anadolu' and 'Göktürk': Turkey names its star and planet
- ^ A Lucky Imaging search for stellar companions to transiting planet host stars, 2015, arXiv:1507.01938
- ^ Detection of Na, K, and Hα absorption in the atmosphere of WASP-52b using ESPRESSO, 2020, arXiv:2002.08379
- ^ Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets, 2019, arXiv:1908.10732
- ^ WASP-52b. The effect of starspot correction on atmospheric retrievals, 2019, arXiv:1911.05179
- ^ Constraints on Metastable Helium in the Atmospheres of WASP-69b and WASP-52b with Ultra-Narrowband Photometry, 2020, arXiv:2004.13728
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