Astronomy:HAT-P-16

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HAT-P-16 is a F-type main-sequence star about 725 light-years away. The star has a concentration of heavy elements slightly higher than solar abundance,[1] and low starspot activity.[2] The survey in 2015 have failed to find any stellar companions to it.[3] 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.[4]

Planetary system

In 2010 a transiting hot superjovian planet was detected.[1] Transit-timing variation analysis in 2016 have failed to detect an additional planets in the system.[5]

Size comparison of HAT-P-16 b and Jupiter

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°.[6]

The planet HAT-P-16b equilibrium temperature was found to be equal to 1567±22 K in 2013.[7] 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.[8]

The HAT-P-16 planetary system[1][9][7][5][10]
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. ↑ 1.0 1.1 1.2 Cite error: Invalid <ref> tag; no text was provided for refs named Buchhave2010
  2. ↑ Shkolnik, Evgenya L. (2013), "An Ultraviolet Investigation of Activity on Exoplanet Host Stars", The Astrophysical Journal 766 (1): 9, doi:10.1088/0004-637X/766/1/9, Bibcode: 2013ApJ...766....9S 
  3. ↑ 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, doi:10.1088/0004-637X/814/2/148, Bibcode: 2015ApJ...814..148P 
  4. ↑ 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, doi:10.1088/0004-637X/788/1/39, Bibcode: 2014ApJ...788...39T 
  5. ↑ 5.0 5.1 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), doi:10.1088/1538-3873/128/960/024402, Bibcode: 2016PASP..128b4402S 
  6. ↑ Moutou, C.; Díaz, R. F.; Udry, S.; Hébrard, G.; Bouchy, F.; Santerne, A.; Ehrenreich, D.; Arnold, L. et al. (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, doi:10.1051/0004-6361/201116760, Bibcode: 2011A&A...533A.113M 
  7. ↑ 7.0 7.1 Ciceri, S.; Mancini, L.; Southworth, J.; Nikolov, N.; Bozza, V.; Bruni, I.; Calchi Novati, S.; d'Ago, G. et al. (2013). "Simultaneous follow-up of planetary transits: Revised physical properties for the planetary systems HAT-P-16 and WASP-21". Astronomy & Astrophysics 557: A30. doi:10.1051/0004-6361/201321669. Bibcode: 2013A&A...557A..30C. 
  8. ↑ 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, doi:10.1016/j.newast.2013.08.002 
  9. ↑ 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, doi:10.1111/j.1365-2966.2012.20839.x, Bibcode: 2012MNRAS.422.3151H 
  10. ↑ Bonomo, A. S. et al. (2017), "The GAPS Programme with HARPS-N at TNG", Astronomy & Astrophysics 602: A107, doi:10.1051/0004-6361/201629882, Bibcode: 2017A&A...602A.107B 

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Coordinates: Sky map 00h 38m 17.5584s, +42° 27′ 47.2169″



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