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Planetary Group Seminar: Thermal and mechanical properties in the near-surface of comet 67P/Churyumov-Gerasimenko from Rosetta (N. Attree)

  • Date: Oct 4, 2018
  • Time: 11:00 - 12:00
  • Speaker: Nicolas Attree
  • Earth and Planetary Observation Centre, University of Stirling
  • Location: MPS
  • Room: Auditorium
  • Host: Urs Mall
Measuring cometary material strengths and other mechanical properties can help put constraints on the formation and evolution of these, likely primordial, bodies. I will present results from two pieces of work investigating the near surface of 67P/Churyumov-Gerasimenko from Rosetta: an observational study of overhanging cliffs from OSIRIS images, and modelling work on thermo-mechanical fracturing. These studies support a low bulk strength, primordial model of comets but with a significantly thermally modified surface layer, with greater strength, as found by the Philae lander.


 
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