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We are seeking a postdoctoral researcher to work on the interiors and long-term evolution of sub-Neptunes within the Exoplanet Interiors and Atmospheres group led by Prof. Caroline Dorn. The position is part of the NCCR Genesis, the National Centre of Competence in Research on the emergence of life in the Universe, providing access to a Switzerland-wide, interdisciplinary network spanning planetary physics, geochemistry, chemistry, and biology. The position is for two years, with the possibility of extension to a third year subject to NCCR Genesis procedures.

Recent research has challenged the traditional layered model of sub-Neptune interiors, raising questions about miscibility, demixing, chemistry-driven convection, volatile exchange between magma oceans and envelopes, and their impact on observable atmospheres. Applicants are encouraged to propose their own research ideas within this scope.

Tasks

  • Improve atmosphere-interior evolution models tailored to sub-Neptunes.
  • Investigate how interior mixing imprints on observable atmospheres.
  • Link modeling results to spectroscopically observed atmospheres.
  • Build frameworks to analyse populations of observed sub-Neptunes to test formation hypotheses.

Requirements

  • PhD in astrophysics, planetary science, geophysics, physics, or a closely related field, completed by the start date.
  • Strong scientific programming skills in Python and comfortable working with version control (git) in a collaborative codebase.
  • Fluent, critical use of AI-assisted tools in research and code development; these are considered part of the standard toolkit and are expected to be used with judgement.
  • Fortran is useful, as parts of the modelling infrastructure rely on it, but it is not a requirement.
  • Experience in one or more of the following: planetary interior or structure modelling, thermal evolution, high-pressure equations of state, atmospheric modelling, magma-ocean chemistry, or statistical inference.
  • Independence, curiosity, and an interest in working across disciplinary boundaries.

Benefits

  • An independent research position in a group working across interior structure, atmospheric characterisation, and magma-ocean chemistry, with links to the PLATO mission and JWST programmes.
  • Outstanding research environment at ETH Zurich.
  • Competitive salary and benefits according to ETH regulations.
  • Support for conference travel, computing, and career development.
  • Zurich consistently ranks among the world’s most liveable cities.
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Die ETH Zürich ist eine technisch-naturwissenschaftliche Hochschule des Bundes mit Sitz in Zürich. Wir betreiben Lehre, Forschung und Wissenstransfer in Bereichen wie Ingenieurwissenschaften, Naturwissenschaften, Architektur, Mathematik, Informatik, Management sowie Sozial- und Geisteswissenschaften. Unsere Ausbildung umfasst Bachelor-, Master-, Doktorats- und Weiterbildungsangebote und ist eng mit internationaler Spitzenforschung verbunden. Als Teil des ETH-Bereichs entwickeln wir wissenschaftliche Grundlagen, Technologien und Lösungen für Gesellschaft, Wirtschaft und globale Herausforderungen.
Das Team

The Exoplanet Interiors and Atmospheres group, led by Prof. Caroline Dorn, works across interior structure, atmospheric characterisation, and magma-ocean chemistry, with connections to the PLATO mission and JWST programmes.

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