The GPI Exoplanet Survey II: Atmospheres and Orbits of Substellar Companions to Young and Nearby Stars

The Gemini Planet Imager Exoplanet Survey (GPIES) is a 600-star survey for young Jovian-mass exoplanets at Solar System scales. To date, GPIES has imaged six exoplanets and four brown dwarfs and has developed the data reduction tools necessary to characterize these companions. GPI is therefore building up a uniform library of 1 to 2.4 micron near-infrared low-resolution spectra of young substellar objects. A more thorough comparison with libraries of field and young brown dwarf near-infrared spectra is now possible to detail similarities and difference between the two families. I will present the current status of the library, discuss how these objects sample different regimes of atmospheric properties, and how similar they are to young free-floating planetary mass objects. I will also show the orbits of these companions and discuss what inferences we can make from their dynamics.