Papers › Magnetic Field Evolution of Hot Exoplanets
Magnetic Field Evolution of Hot Exoplanets
Konstantinos Kilmetis, Aline A. Vidotto, Andrew Allan, Daria Kubyshkina
The archive published only this paper's code-link row. Authors, date and abstract are from arXiv's metadata (CC0), read from the Kaggle arXiv metadata snapshot of 2026-09-12 where its title matched the archive's; the title is the archive's.
Numerical simulations have shown that the strength of planetary magnetic fields depends on the convective energy flux emerging from planetary interiors. Here we model the interior structure of gas giant planets using \texttt{MESA}, to determine the convective energy flux that can drive the generation of magnetic field. This flux is then incorporated in the Christensen et al. dynamo formalism to estimate the maximum dipolar magnetic field B⁽ᵐᵃˣ⁾_(dip) of our simulated planets. First, we explore how the surface field of intensely irradiated hot Jupiters (∼300 M_⊕) and hot Neptunes (∼20 M_⊕) evolve as they age. Assuming an orbital separation of 0.1 au, for the hot Jupiters, we find that B⁽ᵐᵃˣ⁾_(dip) evolves from 240 G at 500 Myr to 120 G at 5~Gyr. For hot Neptunes, the magnetic field evolves from 11 G at young ages and dies out at ≳ 2 Gyr. Furthermore, we also investigate the effects of atmospheric mass fraction, atmospheric evaporation, orbital separations α and additional planetary masses on the derived B⁽ᵐᵃˣ⁾_(dip). We found that B⁽ᵐᵃˣ⁾_(dip) increases with α for very close-in planets and plateaus out after that. Higher atmospheric mass fractions lead in general to stronger surface fields, because they allow for more extensive dynamo regions and stronger convection.
Code
Repository list and official/mentioned flags are the archive's, frozen 2025-07-28. Reachability, where shown, is from one Syntology probe window (2026-09-16 to 2026-09-18); repositories not probed show nothing. GitHub stars are not tracked.
Code Syntology ran Syntology
Not run by Syntology. Nothing on this page verifies that the listed code works.
Results from the paper archive 2025-07-28
No leaderboard rows for this paper in the archive.
Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections