On October 19, 2010, Dr. David Minton will be the tenth speaker for the NLSI Director’s Seminar Series. He will be speaking on “Terrestrial planet embryo migration and applications for the formation of Mars and the bombardment history of the Moon”
Thank you to all who joined the tenth NLSI Director’s Seminar. You can view an archive of the talk here.
See the posted description for the talk below.
The tenth speaker for the NLSI Director’s Seminar Series will be Dr. David Minton, a researcher on the NLSI team lead by Bill Bottke.
Terrestrial planet embryo migration and applications for the formation of Mars and the bombardment history of the Moon.
Planetesimal-driven migration has come to be understood as an important process in the evolution of the orbits of the giant planets. We investigate here whether planetesimal-driven migration may have been important while rocky planetary embryos were accreting within in a massive swarm of planetesimals in the inner solar system, where “embryo” is defined to as lunar to Mars-mass bodies. Planetesimal-driven migration becomes important if embryos can migrate through a planetesimal disk at a faster rate than the rate of embryo growth; migrating embryos can reach embryo-free zones of the disk before new embryos have a chance to grow there. One possible outcome of a migrating embryo model of terrestrial planet formation is that the outward migration of Mars may have been responsible for keeping its mass small. A consequence of this outward migration is that Mars may have populated the inner asteroid belt with planetesimals, directly analogous to the resonant Kuiper belt objects that were presumably populated by Neptune’s outward migration. These resonant objects may have been an important contributor to terrestrial planet impacts when they became unstable due to the later migration of the outer giant planets.
Dr. David A. Minton is a postdoctoral researcher at the Southwest Research Institute in Boulder, CO. His primary focus is on dynamical models of the formation of the terrestrial planets, the dynamical history of the main asteroid belt, and the early bombardment history of the solar system. Next year he will be joining the Department of Earth and Atmospheric Sciences at Purdue University as an Assistant Professor.
WHEN:Tuesday, October 19, 2010. 9:00 AM Pacific, 16:00 GMT
HOW TO PARTICIPATE:
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Posted: Oct 13, 12:12 pm