The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age

  title={The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age},
  author={Erik A. Petigura and James G Rogers and Howard T. Isaacson and James E. Owen and Adam L. Kraus and Joshua N. Winn and Mason G. MacDougall and Andrew W. Howard and Benjamin J. Fulton and Molly R. Kosiarek and Lauren M. Weiss and Aida Behmard and Sarah C. Blunt},
  journal={The Astronomical Journal},
In 2017, the California-Kepler Survey (CKS) published its first data release (DR1) of high-resolution optical spectra of 1305 planet hosts. Refined CKS planet radii revealed that small planets are bifurcated into two distinct populations, super-Earths (smaller than 1.5 R ⊕) and sub-Neptunes (between 2.0 and 4.0 R ⊕), with few planets in between (the “radius gap”). Several theoretical models of the radius gap predict variation with stellar mass, but testing these predictions is challenging with… 

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    The Astrophysical Journal
  • 2022
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The California-Kepler Survey (CKS) is an observational program developed to improve our knowledge of the properties of stars found to host transiting planets by NASA’s Kepler Mission. The improvement

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  • E. Petigura
  • Physics, Geology
    The Astronomical Journal
  • 2020
Recently, several groups have resolved a gap that bifurcates planets between the size of Earth and Neptune into two populations. The location and depth of this feature is an important signature of

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The lithium doublet at 6708 Å provides an age diagnostic for main sequence FGK dwarfs. We measured the abundance of lithium in 1305 stars with detected transiting planets from the Kepler mission

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