The Gemini Planet Imager Exoplanet Survey: Constraints on Wide-Separation Giant Planet Populations from the First 300 Stars
The Gemini Planet Imager Exoplanet Survey (GPIES) is one of the largest, deepest direct imaging planet searches conducted to date. The combination of advanced wavefront control, coronagraphy, and data processing has allowed GPIES to routinely reach planets more massive than Jupiter within 10 AU of their parent stars. This level of sensitivity and a statistically significant number of detected substellar objects allow us to directly measure the underlying population of wide-separation (10-100 AU) giant planets. We present the results from a Bayesian analysis of the first 300 stars in the campaign and compare our inferred power-law distribution of planet properties to radial velocity constraints on similar-mass planets at closer separations. We also examine how wide-separation giant planet occurrence rate correlates with properties of their host stars, and the implications for future direct imaging surveys.