HAT-P-16
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 38m 17.5584s[1] |
| Declination | +42° 27′ 47.2169″[1] |
| Apparent magnitude (V) | 10.91 |
| Characteristics | |
| Spectral type | F8V |
| Astrometry | |
| Radial velocity (Rv) | -15.51 km/s |
| Proper motion (μ) | RA: -21.564 mas/yr Dec.: -4.588 mas/yr |
| Parallax (π) | 4.3859 ± 0.0847 mas[1] |
| Distance | 740 ± 10 ly (228 ± 4 pc) |
| Details[2][3] | |
| Mass | 1.218±0.039 M☉ |
| Radius | 1.237±0.054 R☉ |
| Luminosity | 1.97±0.22 L☉ |
| Surface gravity (log g) | 4.34±0.03 cgs |
| Temperature | 6140±72 K |
| Metallicity | 0.12±0.08 |
| Rotational velocity (v sin i) | 3.5±0.5 km/s |
| Age | 2.0±0.8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HAT-P-16 is a F-type main-sequence star about 740 light-years away. The star has a concentration of heavy elements slightly higher than solar abundance,[2] and low starspot activity.[4] The survey in 2015 have failed to find any stellar companions to it.[5] The spectral analysis in 2014 have discovered the HAT-P-16 has a carbon to oxygen molar ratio of 0.58±0.08, close to Sun`s value of 0.55.[6]
Planetary system
In 2010 a transiting hot superjovian planet was detected.[2] Transit-timing variation analysis in 2016 have failed to detect an additional planets in the system.[7]
In 2011 the observation utilizing a Rossiter–McLaughlin effect was performed, and the orbit of HAT-P-16b was found to be probably aligned with the equatorial plane of the star, misalignment angle equal to 10±16°.[8]
The planet HAT-P-16b equilibrium temperature was found to be equal to 1567±22 K in 2013.[3] The multiband photometry have failed to find any Rayleigh scattering in the HAT-P-16b atmosphere, which may indicate a presence of hazes or dense cloud deck.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.221±0.092 MJ | 0.04134+0.00044 −0.00045 |
2.7759704±0.0000007 | 0.0462+0.0027 −0.0024 |
86.6±0.7° | 1.190±0.037 RJ |
References
- ^ a b c d HAT-P-16 -- Star
- ^ a b c d HAT-P-16b: A 4 MJ PLANET TRANSITING A BRIGHT STAR ON AN ECCENTRIC ORBIT, 2010, arXiv:1005.2009
- ^ a b c Ciceri, S.; Mancini, L.; Southworth, J.; Nikolov, N.; Bozza, V.; Bruni, I.; Calchi Novati, S.; d'Ago, G.; Henning, Th. (2013). "Simultaneous follow-up of planetary transits: Revised physical properties for the planetary systems HAT-P-16 and WASP-21". Astronomy & Astrophysics. 557: A30. arXiv:1307.5874. Bibcode:2013A&A...557A..30C. doi:10.1051/0004-6361/201321669.
- ^ An Ultraviolet Investigation of Activity on Exoplanet Host Stars, 2013, arXiv:1301.6192
- ^ FRIENDS OF HOT JUPITERS III:AN INFRARED SPECTROSCOPIC SEARCH FOR LOW-MASS STELLAR COMPANIONS, 2015, arXiv:1510.08062
- ^ C/O Ratios of Stars with Transiting Hot Jupiter Exoplanets, 2014, arXiv:1403.6891
- ^ a b EXOPLANET TRANSITS REGISTERED AT THE UNIVERSIDAD DE MONTERREY OBSERVATORY. PART I: HAT-P-12b, HAT-P-13b, HAT-P-16b, HAT-P-23b AND WASP-10b, 2016, arXiv:1601.02292
- ^ Spin-orbit inclinations of the exoplanetary systems HAT-P-8, HAT-P-9 HAT-P-16, and HAT-P-23, 2011, arXiv:1105.3849
- ^ Photometric observation of HAT-P-16b in the near-UV, 2013, arXiv:1310.5397
- ^ {{citation|arxiv=1202.6379|title=Observational constraints on tidal effects using orbital eccentricities|year=2012
- ^ 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
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