Contributed Talk - Splinter Exoplanets

Friday, 17 September 2021, 15:00   (virtual Exo)

The New Generation Planetary Population Synthesis (NGPPS): Comparison with the HARPS GTO survey

Alexandre Emsenhuber, Christoph Mordasini, Michel Mayor, Maxime Marmier, Stéphane Udry, Lokesh Mishra, Yann Alibert, Willy Benz, Erik Asphaug
Ludwig-Maximilians-Universität München; University of Bern, Switzerland; University of Geneva, Switzerland; University of Arizona, United States

Despite the large amount of observational data about exoplanets, the relevant processes that occur during their formation are poorly constrained. However, with the number of discovered planets, it is possible to take the exoplanets as a population and use statistics to constrain their formation. A pathway in this sense is synthetic planet populations. Such an endeavor consists of initial conditions representative of protoplanetary discs, a global formation and evolution model to link initial conditions to final planetary systems, and the application of observational biases to mimic observations of the final systems. The goal is to constrain the formation and evolution model and its many unknowns by matching the synthetic systems with observations. In this presentation, I will discuss the comparison of the synthetic planetary systems with the results of the combined Coralie-HARPS sample. This includes the mass and period of these planets, and what this implies for our understanding on how accretion and planetary migration interact. Further, I will discuss an extension of this approach to include the X-ray luminosity of the host star and its effects on the formation of warm Jupiters.