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The California-Kepler Survey. VII. Precise Planet Radii Leveraging Gaia DR2 Reveal the Stellar Mass Dependence of the Planet Radius Gap

  • Authors: Benjamin J. Fulton, and Erik A. Petigura

2018 The Astronomical Journal 156 264.

  • Provider: AAS Journals

Caption: Figure 8.

Two-dimensional distribution of stellar mass and planet size. The median uncertainty is plotted in the upper left. As we see in Figure 9, the position of the gap, and the population of planets on either side of the gap increases monotonically with increasing stellar mass. We plot a dashed line at the location of the gap to guide the eye. For stars with masses of ≈0.8 ﹩{M}_{\odot }﹩ the gap falls at ≈1.6 ﹩{R}_{\oplus }﹩, while for host stars with masses of ≈1.2 ﹩{M}_{\odot }﹩ the gap occurs at ≈2.0 ﹩{R}_{\oplus }﹩. The peaks of the two populations of planets on either side of the gap also shift in the same way. Planets smaller than 4 ﹩{R}_{\oplus }﹩ tend to be larger around more massive stars and the same is true for the gap between the two populations. The relative occurrence rate between the two populations remains constant for all stellar masses analyzed in this work.

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