Predicted dynamos for terrestrial extra-solar planets and their influence in habitability

TL;DR

This paper models the magnetic field generation in terrestrial exoplanets by analyzing their internal structure and evolution, providing insights into their potential habitability based on magnetic protection.

Contribution

It introduces a method to estimate magnetic moments of exoplanets from mass-radius data and discusses how internal properties influence dynamo activity and habitability.

Findings

Estimated maximum dipolar magnetic moments for various exoplanets

Correlation between core size, density, and magnetic field strength

Implications for planetary habitability based on magnetic protection

Abstract

In this paper, we find the internal stratification for terrestrial planets with given mass-radius pairs, and use the core size and density to estimate their maximum dipolar magnetic moment. We also comment on the temporal evolution, although more information (e.g., core composition, mantle rheology and history) is crucial in determining the state of the dynamo with planetary age.