Göttingen 2025 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 10: Poster Session

EP 10.20: Poster

Donnerstag, 3. April 2025, 11:00–12:30, ZHG Foyer 1. OG

Simulation of sunspots in the chromosphere and further comparison of the results with observations — •Aswathi Krishnan Kutty, Robert Cameron, Damien Przybylski, and Sami Solanki — Max Planck Institute for Solar System Research, Goettingen

At the photospheric level, sunspots consist of a dark central umbra, scattered with umbral dots, surrounded by a filamentary penumbra that is on average considerably brighter than the umbra but darker than the surrounding quiet Sun. In the photosphere, the nearly horizontal Evershed flow is directed outward from the outer edge of the umbra along penumbral filaments. On the other hand, the flow is reversed in the chromosphere, the layer just above the photosphere where the plasma flows inwards and towards the umbra. Radiative MHD codes by, e.g., Heinemann et al. (2007) and Rempel et al. (2009) have been used to simulate sunspots at the photosphere and below. The chromospheric component of the atmosphere near and above a sunspot is not well understood from a theoretical perspective. In this poster, we will present preliminary simulations extending the previous simulations higher into the solar atmosphere.

Keywords: sunspots; chromosphere; MHD simulation