Kepler-730: A Hot Jupiter System with a Close-in, Transiting, Earth-sized Planet

Caleb I. Canas, Songhu Wang, Suvrath Mahadevan, Chad F. Bender, Nathan De Lee, Scott W. Fleming, D. A. Garcia-Hernández, Fred R. Hearty, Steven R. Majewski, Alexandre Roman-Lopes, Donald P. Schneider, Keivan G. Stassun

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Kepler-730 is a planetary system hosting a statistically validated hot Jupiter in a 6.49 day orbit and an additional transiting candidate in a 2.85 day orbit. We use spectroscopic radial velocities from the APOGEE-2N instrument, Robo-AO contrast curves, and Gaia distance estimates to statistically validate the planetary nature of the additional Earth-sized candidate. We perform astrophysical false positive probability calculations for the candidate using the available Kepler data and bolster the statistical validation using radial velocity data to exclude a family of possible binary star solutions. Using a radius estimate for the primary star derived from stellar models, we compute radii of and () for Kepler-730b and Kepler-730c, respectively. Kepler-730 is only the second compact system hosting a hot Jupiter with an inner, transiting planet.

Original languageEnglish (US)
Article numberL17
JournalAstrophysical Journal Letters
Issue number2
StatePublished - Jan 10 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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