The Early Instability Scenario for Planet Formation in the Solar System

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dc.contributor.advisorKaib, Nathan
dc.contributor.authorClement, Matthew
dc.contributor.committeeMemberElwood Madden, Megan
dc.contributor.committeeMemberBaron, Edward
dc.contributor.committeeMemberMullen, Kieran
dc.contributor.committeeMemberWisniewski, John
dc.date.accessioned2019-04-22T16:56:02Z
dc.date.available2019-04-22T16:56:02Z
dc.date.issued2019-05-10
dc.date.manuscript2019-04-09
dc.description.abstractThe leading evolutionary model for the outer solar system, an orbital instability between the solar system’s giant planets, has been shown to greatly disturb the orbits of the young terrestrial planets. Undesirable outcomes such as over-excited orbits, ejections and collisions can be avoided if the instability occurs before the inner planets are fully formed. Such a scenario also has the advantage of limiting the mass and formation time of Mars when it occurs within several million years (Myr) of gas disk dissipation. The dynamical effects of the instability cause many small embryos and planetesimals to scatter away from the forming Mars, and lead to heavy mass depletion in the Asteroid Belt. We present new simulations of this scenario that demonstrate its ability to accurately reproduce the eccentricity, inclination and resonant structures of the Asteroid Belt. Furthermore, we perform simulations using an integration scheme which accounts for the fragmentation of colliding bodies. The final terrestrial systems formed in these simulations provide a better match to the actual planets' compact mass distribution and dynamically cold orbits. An early instability scenario is thus very successful at simultaneously replicating the dynamical state of both the inner and outer solar system.en_US
dc.identifier.urihttps://hdl.handle.net/11244/318422
dc.languageenen_US
dc.subjectPhysics, Astronomy and Astrophysics.en_US
dc.subjectPhysics, General.en_US
dc.thesis.degreePh.D.en_US
dc.titleThe Early Instability Scenario for Planet Formation in the Solar Systemen_US
ou.groupCollege of Arts and Sciences::Homer L. Dodge Department of Physics and Astronomyen_US
shareok.orcidhttps://orcid.org/0000-0001-8933-6878en_US

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