3D Radiative MHD Simulations of Starspots II: Large-scale Structure

Abstract

We compute realistic 3D radiative MHD near-surface models of starspots with substantial penumbrae on cool main-sequence stars using the MURaM simulation code. This work is an improvement on the the previous starspot models in a slab geometry. The umbra, penumbra and the quiet star for all starspots are distinct, not only in intensity and temperature, but also in thermodynamic and velocity structure. These models represent a significant step towards modelling contribution of starspots to stellar lightcurves.

arXiv comment8 pages, 6 figures, accepted for publication in A&A

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Cited by in corpus (3)

• Doppler imaging combined with high-cadence photometry. I. Revisiting the surface of a pre-main-sequence flare star
• Simulations of facular magnetic fields on cool stars I: Main sequence stars with solar metallicity
• Sunspot simulations with MURaM -- I. Parameter study using potential field initial conditions