HAT-P-56b: AN INFLATED MASSIVE HOT JUPITER TRANSITING A BRIGHT F STAR FOLLOWED UP with K2 CAMPAIGN 0 OBSERVATIONS

C. X. Huang, J. D. Hartman, G. Bakos, K. Penev, W. Bhatti, A. Bieryla, M. De Val-Borro, D. W. Latham, L. A. Buchhave, Z. Csubry, G. Kovács, B. Béky, E. Falco, P. Berlind, M. L. Calkins, G. A. Esquerdo, J. Lázár, I. Papp, P. Sári

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12 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number85
JournalAstronomical Journal
Volume150
Issue number3
DOIs
StatePublished - Sep 1 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • planetary systems
  • stars: individual (HAT-P-56)
  • techniques: photometric
  • techniques: spectroscopic

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    Huang, C. X., Hartman, J. D., Bakos, G., Penev, K., Bhatti, W., Bieryla, A., Val-Borro, M. D., Latham, D. W., Buchhave, L. A., Csubry, Z., Kovács, G., Béky, B., Falco, E., Berlind, P., Calkins, M. L., Esquerdo, G. A., Lázár, J., Papp, I., & Sári, P. (2015). HAT-P-56b: AN INFLATED MASSIVE HOT JUPITER TRANSITING A BRIGHT F STAR FOLLOWED UP with K2 CAMPAIGN 0 OBSERVATIONS. Astronomical Journal, 150(3), [85]. https://doi.org/10.1088/0004-6256/150/3/85