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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/23746
Title: Phobos grooves and impact craters: A stereographic analysis
Authors: SIMIONI, EMANUELE 
PAJOLA, MAURIZIO 
MASSIRONI, MATTEO
CREMONESE, Gabriele 
Issue Date: 2015
Journal: ICARUS 
Number: 256
First Page: 90
Abstract: Phobos parallel grooves were first observed on Viking images 38 years ago and since then they have been greatly debated leading to several formation hypotheses. Nevertheless, none of them have been favoured and widely accepted. In this work, we provide a different approach, assuming that Phobos grooves can be the expression of fracture planes, and deriving their spatial distribution and orientation on 3D reconstructions, we point out that any origin related only to craters at Phobos surface should be ruled out, since the majority of the grooves is unrelated to any craters now present at its surface. This raises the intriguing possibility that such grooves, if expression of fracture planes, are remnant features of an ancient parent body from which Phobos could have originated. Such scenario has never been considered for Phobos, though this origin was already proposed for the formation of 433 Eros grooves (Buczkowski, D.L., Barnouin-Jha, O.S., Prockter, L.M. [2008]. Icarus 193, 39). If this idea holds true, the observed groove distribution could be explained as the result of possible major impacts on the larger parent body, which were inherited by the "Phobos shard".
Acknowledgments: Acknowledgments We thank Dr. Thomas Duxbury and a second anonymous referee for important, as well as constructive comments, suggestions and corrections that lead to a substantial improvement of the paper. It is appropriate a special acknowledgment to Prof. Pico Zora who accompanied us in the itinerary of this work with its knowledge and personal passion for small bodies.
URI: http://hdl.handle.net/20.500.12386/23746
URL: https://www.sciencedirect.com/science/article/abs/pii/S001910351500144X
ISSN: 0019-1027
DOI: 10.1016/j.icarus.2015.04.009
Bibcode ADS: 2015Icar..256...90S
Fulltext: reserved
Appears in Collections:1.01 Articoli in rivista

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