HAT-P-68b: A transiting hot jupiter around a K5 dwarf star

Bethlee M. Lindor, Joel D. Hartman, Gáspár Bakos, Waqas Bhatti, Zoltan Csubry, Kaloyan Penev, Allyson Bieryla, David W. Latham, Guillermo Torres, Lars A. Buchhave, Miguel De Val-Borro, Andrew W. Howard, Howard Isaacson, Benjamin J. Fulton, Isabelle Boisse, Alexandre Santerne, Guillaume Hébrard, Támás Kovács, Chelsea X. Huang, Jack DembickyEmilio Falco, Mark E. Everett, Elliott P. Horch, József Lázár, István Papp, Pál Sári

Research output: Contribution to journalArticlepeer-review

Abstract

We report the discovery by the ground-based Hungarian-made Automated Telescope Network (HATNet) survey of the transiting exoplanet HAT-P-68b, which has a mass of 0.724 ± 0.043MJ, and radius of 1.072 ± 0.012 RJ. The planet is in a circular P = 2.2984 day orbit around a moderately bright V = 13.937 ± 0.030 magnitude K-dwarf star of mass 673+0.020-0.0.014 M⊙, and radius 0.6726 ± 0.0069 R⊙. The planetary nature of this system is confirmed through follow-up transit photometry obtained with the Fred L. Whipple Observatory (FLWO) 1.2 m telescope, high-precision radial velocities measured using Keck I/High Resolution Echelle Spectrometer (HIRES), FLWO 1.5 m/Tillinghast Reflector Echelle Spectrograph (TRES), and Observatoire de Haute-Provence (OHP) 1.9 m/Sophie, and high-spatial-resolution speckle imaging from WIYN 3.5 m/DSSI. HAT-P-68 is at an ecliptic latitude of +3° and outside the field of view of both the NASA Transiting Exoplanet Survey Satellite primary mission and the K2 mission. The large transit depth of 0.036 mag (r band) makes HAT-P-68b a promising target for atmospheric characterization via transmission spectroscopy.

Original languageEnglish (US)
Article numberabc700
JournalAstronomical Journal
Volume161
Issue number2
DOIs
StatePublished - Feb 1 2021

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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