MAGRATHEA 2.0: Advancements in Interior Structure Modeling for Exoplanets

MAGRATHEA is an open-source interior structure solver designed for customizable planet modeling. Our code provides users with the flexibility to select from adaptable phase diagrams for the core, mantle, hydrosphere, and atmosphere. With a choice of over 42 equations of state for planet-building materials, MAGRATHEA empowers the tailoring of models to specific planetary scenarios. I highlight recent developments including a 3-layer mass solver from observed mass and radius, tabulated equations of state, and the ability to use compositional mixtures which all significantly broaden the code’s applicability. Notably, these improvements more accurately model sub-Neptunes, increasing the radius by up to 30% compared to a simplistic model. I explore the interior compositions of planets in the Trappist-1 and TOI-1751 systems, showcasing how MAGRATHEA facilitates a more comprehensive understanding of exoplanet interiors.