HAT-P-56b: An Inflated Massive Hot Jupiter Transiting a Bright F Star Followed Up with K2 Campaign 0 Observations

Huang, C. X. ORCID: https://orcid.org/0000-0003-0918-7484 and Hartman, J. D. and Bakos, G. A. and Penev, K. and Bhatti, W. and Bieryla, A. and de Val-Borro, M. and Latham, D. W. and Buchhave, L. A. and Csubry, Z. and Kovacs, G. and Beky, B. and Falco, E. and Berlind, P. and Calkins, M. L. and Esquerdo, G. A. and Lazar, J. and Papp, I. and Sari, P. (2015) HAT-P-56b: An Inflated Massive Hot Jupiter Transiting a Bright F Star Followed Up with K2 Campaign 0 Observations. The Astronomical Journal, 150 (3):85. pp. 1-11. ISSN 0004-6256

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We report the discovery of HAT-P-56b by the HATNet survey, an inflated hot Jupiter transiting a bright F-type star in Field 0 of NASA's K2 mission. We combine ground-based discovery and follow-up light curves with high precision photometry from K2, as well as ground-based radial velocities from the Tillinghast Reflector Echelle Spectrograph on the Fred Lawrence Whipple Observatory 1.5 m telescope to determine the physical properties of this system. HAT-P-56b has a mass of 2.18 , radius of 1.47 , and transits its host star on a near-grazing orbit with a period of 2.7908 day. The radius of HAT-P-56b is among the largest known for a planet with . The host star has a V-band magnitude of 10.9, mass of 1.30 , and radius of 1.43 . The periodogram of the K2 light curve suggests that the star is a γ Dor variable. HAT-P-56b is an example of a ground-based discovery of a transiting planet, where space-based observations greatly improve the confidence in the confirmation of its planetary nature, and also improve the accuracy of the planetary parameters.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 31 Mar 2022 00:11
Last Modified: 31 Mar 2022 01:23
Uncontrolled Keywords: planetary systems; stars: individual (HAT-P-56); techniques: photometric; techniques: spectroscopic; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Identification Number or DOI: https://doi.org/10.1088/0004-6256/150/3/85
URI: http://eprints.usq.edu.au/id/eprint/47412

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