Based on atmospheric parameters, size, or distance from the star, is there any way to simulate or predict the magnetosphere of an exoplanet? Are there programs (similar to climate models for atmospheres) that can simulate magnetospheres?

  • $\begingroup$ The only planet anyone has every truly simulated with any real fidelity is the Earth. You need seriously high-end code and super computers to simulate something as complex as planetary magnetic fields. As AtmosphericPrisonEscape says, to try and simulate this for an exoplanet which we know almost nothing about is 99.9999% guesswork and any results would be meaningless. $\endgroup$ – zephyr Jul 21 '17 at 12:58

The magnetosphere is usually not generated by the atmosphere, but by the interior ferromagnetic flows of a planet. I say usually not, because Venus is an exception for the terrestrial planets in our solar system.
But in general rocky planets will exhibit a wide range of interior flow conditions, depending on their individual composition and state of cooling.
Gaseous planets can be a bit easier in that case, if one accepts uncertainties about the properties of metallic hydrogen.

If you then simply go an assume you know all those complicated properties, then sure, you can simulate something. But it's not a scientifically testable prediction only playing around with parameters, as long as it's not tied to a specific object.

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