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- W2020009862 abstract "It is generally believed that Charon was formed as a result of a large, grazing collision with Pluto that supplied the Pluto–Charon system with its high angular momentum. It has also been proposed that Pluto's small outer moons, Nix and Hydra, formed from debris from the Charon-forming impact, although the viability of this scenario remains unclear. Here I use smooth particle hydrodynamics impact simulations to show that it is possible to simultaneously form an intact Charon and an accompanying debris disk from a single impact. The successful cases involve colliding objects that are partially differentiated prior to impact, having thin outer ice mantles overlying a uniform composition rock–ice core. The composition of the resulting debris disks varies from a mixture of rock and ice (similar to the bulk composition of Pluto and Charon) to a pure ice disk. If Nix and Hydra were formed from such an impact-generated disk, their densities should be less than or similar to that of Charon and Pluto, and the small moons could be composed entirely of ice. If they were instead formed from captured material, a mixed rock–ice composition and densities similar to that of Charon and Pluto would be expected. Improved constraints on the properties of Nix and Hydra through occultations and/or the New Horizons encounter may thus help to distinguish between these two modes of origin, particularly if the small moons are found to have ice-like densities." @default.
- W2020009862 created "2016-06-24" @default.
- W2020009862 creator A5072309602 @default.
- W2020009862 date "2010-12-29" @default.
- W2020009862 modified "2023-10-13" @default.
- W2020009862 title "ON A GIANT IMPACT ORIGIN OF CHARON, NIX, AND HYDRA" @default.
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- W2020009862 doi "https://doi.org/10.1088/0004-6256/141/2/35" @default.
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