HAT-P-16

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]

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]
Distance740 ± 10 ly
(228 ± 4 pc)
Details[2][3]
Mass1.218±0.039 M☉
Radius1.237±0.054 R☉
Luminosity1.97±0.22 L☉
Surface gravity (log g)4.34±0.03 cgs
Temperature6140±72 K
Metallicity0.12±0.08
Rotational velocity (v sin i)3.5±0.5 km/s
Age2.0±0.8 Gyr
Other designations
Gaia DR2 3815923136483872000, TYC 2792-1700-1, GSC 02792-01700, 2MASS J00381756+4227470[1]
Database references
SIMBADdata


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]

Size comparison of HAT-P-16 b and Jupiter
The HAT-P-16 planetary system[2][10][3][7][11]
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
  1. HAT-P-16 -- Star
  2. Buchhave, L. A.; Bakos, G. Á.; Hartman, J. D.; Torres, G.; Kovács, G.; Latham, D. W.; Noyes, R. W.; Esquerdo, G. A.; Everett, M.; Howard, A. W.; Marcy, G. W.; Fischer, D. A.; Johnson, J. A.; Andersen, J.; Fűrész, G.; Perumpilly, G.; Sasselov, D. D.; Stefanik, R. P.; Béky, B.; Lázár, J.; Papp, I.; Sári, P. (2010), "HAT-P-16b: A 4MJPLANET TRANSITING a BRIGHT STAR ON AN ECCENTRIC ORBIT", The Astrophysical Journal, 720 (2): 1118–1125, arXiv:1005.2009, Bibcode:2010ApJ...720.1118B, doi:10.1088/0004-637X/720/2/1118, S2CID 34104016
  3. 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. S2CID 55192357.
  4. Shkolnik, Evgenya L. (2013), "An Ultraviolet Investigation of Activity on Exoplanet Host Stars", The Astrophysical Journal, 766 (1): 9, arXiv:1301.6192, Bibcode:2013ApJ...766....9S, doi:10.1088/0004-637X/766/1/9, S2CID 118415788
  5. Piskorz, Danielle; Knutson, Heather A.; Ngo, Henry; Muirhead, Philip S.; Batygin, Konstantin; Crepp, Justin R.; Hinkley, Sasha; Morton, Timothy D. (2015), "Friends of Hot Jupiters. III. An Infrared Spectroscopic Search for Low-Mass Stellar Companions", The Astrophysical Journal, 814 (2): 148, arXiv:1510.08062, Bibcode:2015ApJ...814..148P, doi:10.1088/0004-637X/814/2/148, S2CID 11525988
  6. Teske, Johanna K.; Cunha, Katia; Smith, Verne V.; Schuler, Simon C.; Griffith, Caitlin A. (2014), "C/O Ratios of Stars with Transiting Hot Jupiter Exoplanets", The Astrophysical Journal, 788 (1): 39, arXiv:1403.6891, Bibcode:2014ApJ...788...39T, doi:10.1088/0004-637X/788/1/39, S2CID 119210392
  7. Sada, Pedro V.; Ramón-Fox, Felipe G. (2016), "Exoplanet Transits Registered at the Universidad de Monterrey Observatory. I. HAT-P-12b, HAT-P-13b, HAT-P-16b, HAT-P-23b, and WASP-10b", Publications of the Astronomical Society of the Pacific, 128 (960): 024402, arXiv:1601.02292, Bibcode:2016PASP..128b4402S, doi:10.1088/1538-3873/128/960/024402, S2CID 119303757
  8. Moutou, C.; Díaz, R. F.; Udry, S.; Hébrard, G.; Bouchy, F.; Santerne, A.; Ehrenreich, D.; Arnold, L.; Boisse, I.; Bonfils, X.; Delfosse, X.; Eggenberger, A.; Forveille, T.; Lagrange, A.-M.; Lovis, C.; Martinez, P.; Pepe, F.; Perrier, C.; Queloz, D.; Santos, N. C.; Ségransan, D.; Toublanc, D.; Troncin, J. P.; Vanhuysse, M.; Vidal-Madjar, A. (2011), "Spin-orbit inclinations of the exoplanetary systems HAT-P-8b, HAT-P-9b, HAT-P-16b, and HAT-P-23b", Astronomy & Astrophysics, 533: A113, arXiv:1105.3849, Bibcode:2011A&A...533A.113M, doi:10.1051/0004-6361/201116760, S2CID 55894097
  9. Pearson, Kyle A.; Turner, Jake D.; Sagan, Thomas G. (2013), "Photometric observation of HAT-P-16b in the near-UV", New Astronomy, 27: 102–110, arXiv:1310.5397, doi:10.1016/j.newast.2013.08.002, S2CID 119309058
  10. Husnoo, Nawal; Pont, Frédéric; Mazeh, Tsevi; Fabrycky, Daniel; Hébrard, Guillaume; Bouchy, François; Shporer, Avi (2012), "Observational constraints on tidal effects using orbital eccentricities★", Monthly Notices of the Royal Astronomical Society, 422 (4): 3151–3177, arXiv:1202.6379, Bibcode:2012MNRAS.422.3151H, doi:10.1111/j.1365-2966.2012.20839.x, S2CID 119179880
  11. Bonomo, A. S.; et al. (2017), "The GAPS Programme with HARPS-N at TNG", Astronomy & Astrophysics, 602: A107, arXiv:1704.00373, Bibcode:2017A&A...602A.107B, doi:10.1051/0004-6361/201629882, S2CID 118923163
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