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The California-Kepler Survey V. Peas in a Pod: Planets in a Kepler Multi-planet System are Similar in Size and Regularly Spaced
Lauren M. Weiss, Geoffrey W. Marcy, Erik A. Petigura +10
We have established precise planet radii, semimajor axes, incident stellar fluxes, and stellar masses for 909 planets in 355 multi-planet systems discovered by Kepler. In this samp…
Absence of a metallicity effect for ultra-short-period planets
Joshua N. Winn, Roberto Sanchis-Ojeda, Leslie Rogers +7
Ultra-short-period (USP) planets are a newly recognized class of planets with periods shorter than one day and radii smaller than about 2 Earth radii. It has been proposed that USP…
The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
John Asher Johnson, Erik A. Petigura, Benjamin J. Fulton +11
We present stellar and planetary properties for 1305 Kepler Objects of Interest (KOIs) hosting 2025 planet candidates observed as part of the California-Kepler Survey. We combine s…
The California-Kepler Survey. I. High Resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets
Erik A. Petigura, Andrew W. Howard, Geoffrey W. Marcy +12
The California-Kepler Survey (CKS) is an observational program to improve our knowledge of the properties of stars found to host transiting planets by NASA's Kepler Mission. The im…
The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
Benjamin J. Fulton, Erik A. Petigura, Andrew W. Howard +10
The size of a planet is an observable property directly connected to the physics of its formation and evolution. We used precise radius measurements from the California-Kepler Surv…