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Title: An In-Situ Formation Model for Systems of Tightly-Packed Inner Planets
Using high-resolution N-body simulations, we investigate the outcome of terrestrial planet formation at short (< 100 day) orbital periods under a migration-free model. The collisional and dynamical evolution of systems of nearly 106 self-interacting planetesimals are directly followed through the final planet assembly phase. This is done by first modeling the planetesimal evolution with the tree-based N-body code ChaNGa, and then passing the results to the hybrid-symplectic N-body code genga, once the particle count has dropped sufficiently. Previously, we showed that oligarchic growth fails to operate at arbitrarily short orbital periods. This leaves a distinct feature in the mass and orbital distribution of the planetary embryos. In this most recent work, we explore whether this boundary between oligarchic and non-oligarchic growth leaves any kind of imprint on the terrestrial planets that form. If so, this would provide an important clue to evaluate whether migration played a significant role in shaping the architecture systems of tightly-packed inner planets.  more » « less
Award ID(s):
2006752
PAR ID:
10353256
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Bulletin of the American Astronomical Society
Volume:
54
Issue:
4
ISSN:
2330-9458
Page Range / eLocation ID:
302.03
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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