Consolmagno, G. J.G. J.ConsolmagnoGolabek, G. J.G. J.GolabekTURRINI, DiegoDiegoTURRINIJutzi, M.M.JutziSirono, S.S.SironoSvetsov, V.V.SvetsovTsiganis, K.K.Tsiganis2020-04-152020-04-1520150019-1035http://hdl.handle.net/20.500.12386/24044It is difficult to find a Vesta model of iron core, pyroxene and olivine-rich mantle, and HED crust that can match the joint constraints of (a) Vesta's density and core size as reported by the Dawn spacecraft team; (b) the chemical trends of the HED meteorites, including the depletion of sodium, the FeO abundance, and the trace element enrichments; and (c) the absence of exposed mantle material on Vesta's surface, among Vestoid asteroids, or in our collection of basaltic meteorites. These conclusions are based entirely on mass-balance and density arguments, independent of any particular formation scenario for the HED meteorites themselves. We suggest that Vesta either formed from source material with non-chondritic composition or underwent after its formation a radical physical alteration, possibly caused by collisional processes, that affected its global composition and interior structure.STAMPAenArticle10.1016/j.icarus.2015.03.0292-s2.0-84927927784000355022000016https://www.sciencedirect.com/science/article/abs/pii/S001910351500130X?via%3Dihub2015Icar..254..190CFIS/05 - ASTRONOMIA E ASTROFISICAScienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation