Date: Monday 28-November-2022
Time: 11:15-12:15
Location: Zoom (contact for link)
Speaker: Xian Shi
Title: Boulder ejection and mobilisation on comet 67P observed by Rosetta/OSIRIS
Abstract: With an unprecedented resolution, OSIRIS cameras on board ESA’s Rosetta mission witnessed a diversity of dust activity during over two years’ rendezvous with comet 67P/Churyumov-Gerasimenko. These observations show, besides nominal ‘jets’ and spontaneous outbursts, also ejections of boulders that are aggregates decimetres to metres in size. In this talk, I will introduce observations of various forms of boulder activity on 67P, and our investigation to explain possible underlying mechanisms. We found that such activity could be a significant part of the resurfacing process of the nucleus and contributes to the redistribution of icy materials.
For further information contact PALS coordinator Quanzhi Ye at qye@umd.edu.
SPECIAL ACCOMMODATIONS:Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.
