The rocky‐like behavior of cometary landslides on 67P/Churyumov‐Gerasimenko
2 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
3 Dipartimento di Geoscienze [Padova]
4 IRPI - Research Institute for Geo-hydrological Protection [Perugia]
5 DLR Institut für Planetenforschung
6 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
7 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
8 Dipartimento di Fisica e Astronomia "Galileo Galilei"
9 IFN - CNR Istituto di Fotonica e Nanotecnologie [Padova]
10 PLANETO - LATMOS
11 CAB - Centro de Astrobiologia [Madrid]
12 ISSI - International Space Science Institute [Bern]
13 ESTEC - European Space Research and Technology Centre
14 JPL - Jet Propulsion Laboratory
15 AU - Auburn University
16 IFN - CNR Institute for Photonics and Nanotechnologies
17 Department of Industrial Engineering [University of Padua]
18 UNITN - Università degli Studi di Trento = University of Trento
19 OAT - INAF - Osservatorio Astronomico di Trieste
20 IAA-CSIC - Instituto de Astrofísica de Andalucía = Institute of Astrophysics of Andalusia
21 IANCU - Institute of Astronomy [Taiwan]
22 SSI - Space Science Institute [Macau]
23 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
- Fonction : Auteur
- PersonId : 1014663
- Fonction : Auteur
- PersonId : 1046343
- Fonction : Auteur
- PersonId : 1180244
- ORCID : 0000-0001-9021-1140
- Fonction : Auteur
- PersonId : 873258
- IdHAL : soniafornasier
- ORCID : 0000-0001-7678-3310
- IdRef : 073393266
- Fonction : Auteur
- PersonId : 757032
- ORCID : 0000-0002-6257-9076
- Fonction : Auteur
- PersonId : 766744
- ORCID : 0000-0002-1345-0890
- IdRef : 07339369X
- Fonction : Auteur
- PersonId : 1054476
Résumé
Landslides have been identified on several Solar System bodies and different mechanisms have been proposed to explain their runout length. We analyse images from the Rosetta mission and report the global characterisation 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 behaviour that is much more akin to Earth dry landslides than to icy satellites' mass movements. This behaviour indicates that 67P and likely comets in general are characterised 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.
Domaines
| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
|---|---|
| Licence |
