Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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ORIGINS OF THE FLOW AND MAGNETIC STRUCTURE INVOLVED IN THE FORMATION AND ERUPTION OF A SOLAR PROMINENCE

  • Magara, Tetsuya (Department of Astronomy and Space Science, Kyung Hee University)
  • Received : 2021.07.01
  • Accepted : 2021.09.23
  • Published : 2021.10.31
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Abstract

We investigate flow and magnetic structure of a solar prominence with a focus on how the magnetic field originally determined by subsurface dynamics gives rise to the structure. We perform a magnetohydrodynamic simulation that reproduces the self-consistent evolution of a flow and the magnetic field passing freely through the solar surface. By analyzing Lagrangian displacements of magnetized plasma elements, we demonstrate the flow structure that is naturally incorporated to the magnetic structure of the prominence formed via dynamic interaction between the flow and the magnetic field. Our results explain a diverging flow on a U-loop, a counterclockwise downdraft along a rotating field line, acceleration and deceleration of a downflow along an S-loop, and partial emergence of a W-loop, which may play key roles in determining structural properties of the prominence.

Keywords

Acknowledgement

The author deeply appreciates productive comments provided by the reviewers. He wishes to thank the Kyung Hee University for general support of this work. This work was financially supported by a research program (NRF-2021R1A2C1010310, PI: T. Magara) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology.

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