MAGRATHEA: an open-source spherical symmetric planet interior structure code

TL;DR

MAGRATHEA is an open-source tool for modeling fully differentiated, spherically symmetric planetary interiors, allowing customizable layers, temperature profiles, and equations of state, with community development encouraged.

Contribution

It introduces a flexible, open-source code for planetary interior modeling with customizable layers and thermodynamic options, supporting community contributions.

Findings

Supports up to four layers including iron, silicates, water, and gas.

Allows various temperature profiles: isothermal, isentropic, or user-defined.

Provides detailed documentation for adding new equations of state.

Abstract

MAGRATHEA is an open-source planet structure code that considers the case of fully differentiated spherically symmetric interiors. Given the mass of each layer and the surface temperature, the code iterates the boundary conditions of the hydrostatic equations using the method of shooting to a fitting point in order to find the planet radius. The first version of MAGRATHEA supports a maximum of four layers of iron, silicates, water, and ideal gas. With a few exceptions, the temperature profile can be chosen between isothermal, isentropic, and user-defined functions. The user has many options for the phase diagram and equation of state in each layer and we document how to add additional equations of state. We present MAGRATHEA's capabilities and discuss its applications. We encourage the community to participate in the development of MAGRATHEA at https://github.com/Huang-CL/Magrathea.