Making systems of Super Earths by inward migration of planetary embryos. Issue Volume 8:Issue S299(2013) (6th January 2014)

• Record Type: Journal Article
• Authors: Cossou, Christophe; Raymond, Sean N.; Pierens, Arnaud
• Is Part Of: Proceedings of the International Astronomical Union. Volume 8:Issue S299(2013)
• Page Start: 360
• Page End: 364
• Publication Date: 2014-01-06
• Subjects: Planets and satellites: formation, -- Protoplanetary disks, -- Planet-disk interactions, -- planetary systems, -- Methods: numerical; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921313008958
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Using N-body simulations with planet-disk interactions, we present a mechanism capable of forming compact systems of hot super Earths such as Kepler 11. Recent studies show that outward migration is common in the inner parts of radiative disks. However we show that two processes naturally tip the balance in favor of inward migration. First the corotation torque is too weak to generate outward migration for planetary embryos less massive than 4M⊕ . Second, system of multiple embryos generate sustained non-zero eccentricities that damp the corotation torque and again favor inward migration. Migration and accretion of planetary embryos in realistic disks naturally produce super Earths in resonant chains near the disk inner edge. Their compact configuration is similar to the observed systems.