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  The Rocky‐Like Behavior of Cometary Landslides on 67P/Churyumov‐Gerasimenko

Lucchetti, A., Penasa, L., Pajola, M., Massironi, M., Brunetti, M. T., Cremonese, G., et al. (2019). The Rocky‐Like Behavior of Cometary Landslides on 67P/Churyumov‐Gerasimenko. Geophysical Research Letters, 46(24), 14336-14346. doi:10.1029/2019GL085132.

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 Creators:
Lucchetti, Alice, Author
Penasa, Luca, Author
Pajola, Maurizio, Author
Massironi, Matteo, Author
Brunetti, Maria Teresa, Author
Cremonese, Gabriele, Author
Oklay, Nilda, Author
Vincent, Jean‐Baptiste, Author
Mottola, Stefano, Author
Fornasier, Sonia, Author
Sierks, Holger1, Author              
Naletto, Giampiero, Author
Lamy, Philippe L., Author
Rodrigo, Rafael, Author
Koschny, Detlef, Author
Davidsson, Bjorn, Author
Barbieri, Cesare, Author
Barucci, Maria Antonietta, Author
Bertaux, Jean‐Loup, Author
Bertini, Ivano, Author
Bodewits, Dennis, AuthorCambianica, Pamela, AuthorDeppo, Vania Da, AuthorDebei, Stefano, AuthorCecco, Mariolino De, AuthorDeller, Jakob1, Author              Ferrari, Sabrina, AuthorFerri, Francesca, AuthorFranceschi, Marco, AuthorFulle, Marco, AuthorGutiérrez, Pedro, AuthorGüttler, Carsten1, Author              Ip, Wing‐H., AuthorKeller, Uwe, AuthorLara, Luisa, AuthorLazzarin, Monica, AuthorMoreno, Jose Lopez, AuthorMarzari, Francesco, AuthorTubiana, Cecilia1, Author               more..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: Landslides have been identified on several solar system bodies, and different mechanisms have been proposed to explain their runout length. We analyze images from the Rosetta mission and report the global characterization of such features on comet 67P/Churyumov‐Gerasimenko's surface. By assuming the height to runout length as an approximation for the friction coefficient of landslide material, we find that on comet 67P, this ratio falls between 0.50 and 0.97. Such unexpected high values reveal a rocky‐type mechanical behavior that is much more akin to Earth dry landslides than to icy satellites' mass movements. This behavior indicates that 67P and likely comets in general are characterized by consolidated materials possibly rejecting the idea that they are fluffy aggregates. The variability of the runout length among 67P landslides can be attributed to the different volatile content located in the top few meters of the cometary crust, which can drive the mass movement.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2019GL085132
 Degree: -

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Title: Geophysical Research Letters
  Abbreviation : GRL
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union / Wiley
Pages: - Volume / Issue: 46 (24) Sequence Number: - Start / End Page: 14336 - 14346 Identifier: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217