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Flux emergence simulation and coronal response at ephemeral region scale

Published online by Cambridge University Press:  23 December 2024

Zi–Fan Wang Open the ORCID record for Zi–Fan Wang [Opens in a new window]  and
R. H. Cameron
Zi–Fan Wang*
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
R. H. Cameron
Affiliation:
Max Plank Institute for Solar System Research, Goettingen, Germany
*
email: [email protected]
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Abstract

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Flux emergence at different spatial scales and with different amounts of flux has been studied using radiative magnetohydrodynamics (rMHD) simulations. We use the radiative MHD code MURaM to simulate the emergence of an untwisted magnetic flux tube of ephemeral region scale with a density nonuniformity into a background atmosphere with a small unipolar open field. We find that the tube rises to the photosphere, forming complex loop structures seen in synthetic Atmospheric Imaging Assembly(AIA) 171 Å images. The atmosphere reaches 105 K at 3Mm above the surface. Our simulation provides a reference example of a less twisted ephemeral region emergence and the atmospheric response.

Keywords

Solar ephemeral regionFlux emergence
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S365: Dynamics of Solar and Stellar Convection Zones and Atmospheres , December 2023 , pp. 340 - 344
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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