Japan Geoscience Union Meeting 2023

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[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM11] Exoplanet

Wed. May 24, 2023 10:45 AM - 12:00 PM 102 (International Conference Hall, Makuhari Messe)

convener:Takanori Kodama(The university of Tokyo), Shota Notsu(Star and Planet Formation Laboratory, RIKEN Cluster for Pioneering Research), Yui Kawashima(RIKEN), Mayuko Mori(The University of Tokyo), Chairperson:Yuichi Ito(National Astronomical Observatory of Japan, Division of Science), Shota Notsu(Star and Planet Formation Laboratory, RIKEN Cluster for Pioneering Research)

10:45 AM - 11:00 AM

[PEM11-06] Accretion of solids on eccentric hot Jupiters

★Invited Papers

*Sho Shibata1, Ravit Helled1 (1.Institute for Computational Science, University of Zurich)

Keywords:Formation of giant planets, Hot-Jupiters, Composition of giant planets

The origin of Hot Jupiters is still unknown. These planets may have reached their observed short periods through disk migration or high-eccentricity migration. Each formation path is expected to lead to a different final planetary composition. As a result, determining the composition of hot-Jupiters can reveal information on their formation history. In this study, we investigate the heavy-element (solid) accretion of giant protoplanets as their eccentric orbits evolve to short-period orbits. Using N-body simulations, we compare the planetesimal accretion rates for planets experiencing disk migration and high-eccentricity migration. Finally, we discuss how these results can be used to constrain the formation pathways of hot Jupiters.