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IronHeart

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The origin and evolution of a blastered Mercury

Mercury is a metal-rich planet from which Earth-based and spacecraft data were collected. Our understanding of its interior structure and thermochemical evolution is however still relatively poor. This is due to: (1) large uncerta... ver más

30/09/2029

KU Leuven

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

KATHOLIEKE UNIVERSITEIT LEUVEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-12-14

ERC-2023-COG: ERC CONSOLIDATOR GRANTS Scope:Objectives

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1 Participantes

KU Leuven

2.00M€ | Lider

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Duración del proyecto: 69 meses Fecha Inicio: 2023-12-14
Fecha Fin: 2029-09-30

Líder del proyecto

KATHOLIEKE UNIVERSITEIT LEUVEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Mercury is a metal-rich planet from which Earth-based and spacecraft data were collected. Our understanding of its interior structure and thermochemical evolution is however still relatively poor. This is due to: (1) large uncertainties on its polar moment of inertia and surface composition; this will be largely improved by the BepiColombo mission; (2) an unknown bulk-planet composition; and (3) a poor knowledge of some key thermophysical properties (e.g. phase stability, temperature, density) of solid/liquid metals and silicates inside Mercury. This is because under Mercury’s reducing conditions, elements behave differently than on other planets. Currently available phase diagrams for the Moon and Mars are thus irrelevant for calculating the compositions and physical properties of Mercury’s core, mantle and crust. Improving such constraints is critical but requires new experiments under hitherto unexplored conditions; they will be done in IronHeart. So far, it was largely neglected that many compositional features of Mercury are inconsistent with its direct accretion as a small, metal-rich planet. IronHeart’s working hypothesis is that Mercury is merely the remnant of a larger, Martian-sized, chondritic planet (which we call proto-Mercury) involved in collisions having stripped away much of its mantle. This process did eventually set the final composition of modern Mercury. For the first time, IronHeart will evaluate experimentally how proto-Mercury controlled the core and mantle compositions of modern Mercury. Further experiments on these compositions will provide phase equilibria of Mercury’s internal layers allowing us to calculate their thermophysical properties. By combining those with BepiColombo data into thermal and geophysical models, we will provide a clearer than ever picture of Mercury’s structure and evolution. IronHeart will also be critical to understanding dense exoplanets and the Earth, which accreted from similar building blocks as Mercury.

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