[
    {
        "id": "authors:g0rej-dgj25",
        "collection": "authors",
        "collection_id": "g0rej-dgj25",
        "cite_using_url": "https://authors.library.caltech.edu/records/g0rej-dgj25",
        "type": "article",
        "title": "Powering Ganymede's dynamo with protracted core formation",
        "author": [
            {
                "family_name": "Trinh",
                "given_name": "Kevin T.",
                "orcid": "0000-0001-5370-283X",
                "clpid": "Trinh-Kevin-T"
            },
            {
                "family_name": "Petricca",
                "given_name": "Flavio",
                "orcid": "0000-0002-6574-0507",
                "clpid": "Petricca-Flavio"
            },
            {
                "family_name": "Hemingway",
                "given_name": "Douglas J.",
                "orcid": "0000-0001-5617-207X"
            },
            {
                "family_name": "Vance",
                "given_name": "Steven D.",
                "orcid": "0000-0002-4242-3293",
                "clpid": "Vance-Steven-D"
            }
        ],
        "abstract": "<p>Ganymede is the only known moon with an active dynamo today. Previous studies interpret Ganymede's dynamo as arising from convection in a metal core that formed billions of years ago. However, Ganymede likely accreted too cold to form with a metal core, which confounds interpretations of Ganymede's magnetic field as a constraint on the moon's broader history. Here, we reevaluate the thermal evolution of Ganymede's rock-metal interior from a cold start. Our models show that Ganymede's observed dynamo is consistent with ongoing core formation, a process not yet observed elsewhere. If Ganymede has an Fe-FeS core with a sub-eutectic composition, then gradual mantle warming may expel dense Fe melt onto the growing protocore and stir liquid metal, sustaining a dynamo for billions of years.</p>",
        "doi": "10.1126/sciadv.aed8021",
        "pmcid": "PMC13148312",
        "issn": "2375-2548",
        "publisher": "American Association for the Advancement of Science",
        "publication": "Science Advances",
        "publication_date": "2026-05-08",
        "series_number": "19",
        "volume": "12",
        "issue": "19",
        "pages": "eaed8021"
    }
]