On a magnetar’s surface, magnetic fields can create permanent sunspot-like structures. Accounting for heat diffusion and magnetic evolution in a magnetar’s crust in the latest simulations improves agreement with observations.
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Viganò, D. The patchy temperature map of magnetars. Nat Astron 5, 118–119 (2021). https://doi.org/10.1038/s41550-020-1194-0
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DOI: https://doi.org/10.1038/s41550-020-1194-0
