3D Radiative MHD Simulations of Starspots II: Large-scale Structure
Tanayveer Singh Bhatia, Mayukh Panja, Robert Cameron, Sami Solanki
TL;DR
This paper presents advanced 3D radiative MHD simulations of starspots on cool stars, revealing detailed structures of umbra, penumbra, and quiet regions, improving understanding of their impact on stellar lightcurves.
Contribution
It introduces realistic 3D starspot models with detailed thermodynamic and velocity structures, advancing beyond previous slab geometry models.
Findings
Distinct intensity and temperature profiles in umbra, penumbra, and quiet regions.
Enhanced understanding of starspot contributions to stellar lightcurves.
Improved simulation accuracy over previous models.
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.
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Astro and Planetary Science