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Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars

It has been proposed that Mars’ moons formed from a disk produced by a large impact with the planet. However, whether such an event could produce tiny Phobos and Deimos remains unclear. Using a hybrid N-body model of moon accumulation that includes a full treatment of moon-moon dynamical interaction...

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Detalles Bibliográficos
Autores principales: Canup, Robin, Salmon, Julien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5906076/
https://www.ncbi.nlm.nih.gov/pubmed/29675470
http://dx.doi.org/10.1126/sciadv.aar6887
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author Canup, Robin
Salmon, Julien
author_facet Canup, Robin
Salmon, Julien
author_sort Canup, Robin
collection PubMed
description It has been proposed that Mars’ moons formed from a disk produced by a large impact with the planet. However, whether such an event could produce tiny Phobos and Deimos remains unclear. Using a hybrid N-body model of moon accumulation that includes a full treatment of moon-moon dynamical interactions, we first identify new constraints on the disk properties needed to produce Phobos and Deimos. We then simulate the impact formation of disks using smoothed particle hydrodynamics, including a novel approach that resolves the impact ejecta with order-of-magnitude finer mass resolution than existing methods. We find that forming Phobos-Deimos requires an oblique impact by a Vesta-to-Ceres sized object with ~10(−3) times Mars’ mass, a much less massive impactor than previously considered.
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spelling pubmed-59060762018-04-19 Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars Canup, Robin Salmon, Julien Sci Adv Research Articles It has been proposed that Mars’ moons formed from a disk produced by a large impact with the planet. However, whether such an event could produce tiny Phobos and Deimos remains unclear. Using a hybrid N-body model of moon accumulation that includes a full treatment of moon-moon dynamical interactions, we first identify new constraints on the disk properties needed to produce Phobos and Deimos. We then simulate the impact formation of disks using smoothed particle hydrodynamics, including a novel approach that resolves the impact ejecta with order-of-magnitude finer mass resolution than existing methods. We find that forming Phobos-Deimos requires an oblique impact by a Vesta-to-Ceres sized object with ~10(−3) times Mars’ mass, a much less massive impactor than previously considered. American Association for the Advancement of Science 2018-04-18 /pmc/articles/PMC5906076/ /pubmed/29675470 http://dx.doi.org/10.1126/sciadv.aar6887 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Canup, Robin
Salmon, Julien
Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
title Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
title_full Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
title_fullStr Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
title_full_unstemmed Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
title_short Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
title_sort origin of phobos and deimos by the impact of a vesta-to-ceres sized body with mars
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5906076/
https://www.ncbi.nlm.nih.gov/pubmed/29675470
http://dx.doi.org/10.1126/sciadv.aar6887
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