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• W2783189991 abstract "Asteroid (16) Psyche, which for a long time was the largest M-type with no detection of hydration features in its spectrum, was recently discovered to have a weak 3-μm band and thus it was eventually added to the group of hydrated asteroids. Its relatively high density, in combination with the high radar albedo, led researchers to classify the asteroid as a metallic object. It is believed that it is possibly a core of a differentiated body, a remnant of ‘hit-and-run’ collisions. The detection of hydration is, in principle, inconsistent with a pure metallic origin for this body. Here, we consider the scenario in which the hydration on its surface is exogenous and was delivered by hydrated impactors. We show that impacting asteroids that belong to families whose members have the 3-μm band can deliver hydrated material to Psyche. We developed a collisional model with which we test all dark carbonaceous asteroid families, which contain hydrated members. We find that the major source of hydrated impactors is the family of Themis, with a total implanted mass on Psyche of the order of ∼1014 kg. However, the hydrated fraction could be only a few per cent of the implanted mass, as the water content in carbonaceous chondrite meteorites, the best analogue for the Themis asteroid family, is typically a few per cent of their mass." @default.
• W2783189991 created "2018-01-26" @default.
• W2783189991 creator A5058537408 @default.
• W2783189991 creator A5070287209 @default.
• W2783189991 creator A5072686112 @default.
• W2783189991 date "2018-02-09" @default.
• W2783189991 modified "2023-10-18" @default.
• W2783189991 title "Exogenous origin of hydration on asteroid (16) Psyche: the role of hydrated asteroid families" @default.
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• W2783189991 doi "https://doi.org/10.1093/mnras/sty017" @default.
• W2783189991 hasPublicationYear "2018" @default.
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