Tensile strength of 67P/Churyumov-Gerasimenko nucleus material from overhangs

  title={Tensile strength of 67P/Churyumov-Gerasimenko nucleus material from overhangs},
  author={N. Attree and O. Groussin and L. Jorda and D. N{\'e}bouy and N. Thomas and Y. Brouet and E. Kuhrt and F. Preusker and F. Scholten and J. Knollenberg and P. Hartogh and H. Sierks and C. Barbieri and P. Lamy and R. Rodrigo and D. Koschny and H. Rickman and H. Keller and M. A'Hearn and A-T. Auger and M. Barucci and J. Bertaux and I. Bertini and D. Bodewits and S. Boudreault and G. Cremonese and V. Deppo and B. Davidsson and S. Debei and M. Cecco and J. Deller and M. R. El-Maarry and S. Fornasier and M. Fulle and P. Guti'errez and C. Guttler and S. Hviid and W-H. Ip and G. Kov{\'a}cs and J. Kramm and M. Kuppers and L. Lara and M. Lazzarin and J. Moreno and S. Lowry and S. Marchi and F. Marzari and S. Mottola and G. Naletto and N. Oklay and M. Pajola and I. T{\'o}th and C. Tubiana and J.-B. Vincen and X. Shi},
  journal={Astronomy and Astrophysics},
  • N. Attree, O. Groussin, +52 authors X. Shi
  • Published 2017
  • Physics
  • Astronomy and Astrophysics
  • We directly measured twenty overhanging cliffs on the surface of comet 67P/Churyumov-Gerasimenko extracted from the latest shape model and estimated the minimum tensile strengths needed to support them against collapse under the comet's gravity. We find extremely low strengths of around 1 Pa or less (1 to 5 Pa, when scaled to a metre length). The presence of eroded material at the base of most overhangs, as well as the observed collapse of two features andthe implied previous collapse of… CONTINUE READING

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