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Imprints of Magnetic fields in Exoplanets

Projektbeschreibung

Modelle des Magnetfeldes von Exoplaneten zur Suche nach leuchtenden Riesen und bewohnbaren Welten

Alle Planeten in unserem Sonnensystem außer Venus und Mars haben ein Magnetfeld mit jeweils besonderen Merkmalen. Dies ist ziemlich bemerkenswert und spiegelt die außergewöhnliche Vielfalt der inneren Struktur unserer Nachbarplaneten wider. Abgesehen davon, dass es uns vor geladenen Sonnenteilchen abschirmt und uns bei der Navigation hilft, könnte unser Magnetfeld durch den Erhalt der Ozeane und der Atmosphäre eine wichtige Rolle in der Entwicklung des Lebens auf der Erde gespielt haben. Das EU-finanzierte Projekt IMAGINE untersucht die Entwicklung und Spuren der Magnetfelder von Exoplaneten auf Zeitskalen von Milliarden Jahren, mit dem Ziel, unsere Suche nach aufgeblasenen, radioaktiv leuchtenden Gasriesen und bewohnbaren felsigen Welten voranzutreiben.

Ziel

The fast-growing sample of thousands of extrasolar planets is unveiling an amazing variety of properties. It represents an opportunity to shed light on long-standing physics and astrobiology issues from a much wider sample than our Solar neighbours, especially for what concerns the still unclear internal structure, only grossly constrained by observable values of mass and/or radii. Planetary magnetism and its long-term evolution is currently understood only partially for the Earth, at a lesser extent for Jupiter and other Solar planets, and is still elusive in exoplanets. The project focuses on magnetic fields as a key factor in shaping habitability and as a messenger of the internal composition and dynamics.
For terrestrial planets, long-lasting, strong enough magnetic fields are arguably a key factor to guarantee habitability, but we are not even sure about how the Earth’s magnetic field has survived for so long. Magnetism leaves other detectable imprints in giant planets. A quest for the first exoplanetary Jupiter-like magnetospheric emission in radio is on-going, but the search needs to be driven by a reliable prediction of the most likely emitters. Magnetic fields can delay the cooling via Ohmic dissipation and could explain the often observed inflated radii in hot Jupiters, but models are still incomplete.
IMAGINE will simulate the long-term (Gyr) evolution of the exoplanetary magnetic fields, coupled with a cooling model, and will assess the relevant imprints on their observables for a broad range of distinctive features mass, composition, irradiation, rotation.
Combining a novel formulation, emission models and advanced numerical techniques partially imported and adapted from the scenario of magnetized neutron stars, on which the PI is expert, IMAGINE will predict values of magnetic fields for different exoplanets, comparing the associated observable properties of gas giants and contributing to identify the best rocky worlds candidates to habitability.

Finanzierungsplan

ERC-STG - Starting Grant

Gastgebende Einrichtung

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS
Netto-EU-Beitrag
€ 1 495 046,00
Adresse
CALLE SERRANO 117
28006 Madrid
Spanien

Auf der Karte ansehen

Region
Comunidad de Madrid Comunidad de Madrid Madrid
Aktivitätstyp
Research Organisations
Links
Gesamtkosten
€ 1 495 046,00

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