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Seminar: Meech

August 31, 2015 @ 3:00 pm - 4:00 pm

Astrobiology Seminar

Karen Meech of the Institute for Astronomy will be speaking on:

Early Solar System Leftovers: Testing Solar System Formation Models

One of the most intriguing predictions of the Grand Tack solar system formation
model is the presence of volatile poor objects in the Oort cloud that were
swept from the region where the terrestrial planets formed. This volatile-poor
material is represented today by ordinary chondrites, enstatite chondrites
and differentiated planetesimals. These are the main constituents of the
S-type asteroids that reside in the inner Solar system. According to the
Grand Tack model, the fraction of S-type material in cometary orbits
should be around 0.1-0.2%. Recent Pan-STARRS 1 discoveries of objects
on long-period comet orbits that are minimally active while at small
perihelia have suggested the intriguing possibility that these could potentially
represent inner solar system material that was ejected into the outer solar
system during planet migration, that is now making its way back in.

Details

Date:
August 31, 2015
Time:
3:00 pm - 4:00 pm
Event Categories:
,

Venue

Physical Science Building 211
University of Hawaii at Manoa, Honolulu, HI 96822 United States

Organizer

Karen Meech