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Magnetoacoustic cutoff effect in numerical simulations of the partially ionized solar atmosphere.
Kuzma, Blazej; Kadowaki, Luis H S; Murawski, Kris; Musielak, Zdzislaw E; Poedts, Stefaan; Yuan, Ding; Feng, Xueshang.
Afiliação
  • Kuzma B; Shenzhen Key Laboratory of Numerical Prediction for Space Storm, Harbin Institute of Technology, Shenzhen 51805, People's Republic of China.
  • Kadowaki LHS; Institute of Physics, University of Maria Curie-Sklodowska, ul. Radziszewskiego 10, Lublin 20-031, Poland.
  • Murawski K; Institute of Physics, University of Maria Curie-Sklodowska, ul. Radziszewskiego 10, Lublin 20-031, Poland.
  • Musielak ZE; Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA.
  • Poedts S; Leibniz Institut für Sonnenphysik (KIS), Freiburg, Germany.
  • Yuan D; Institute of Physics, University of Maria Curie-Sklodowska, ul. Radziszewskiego 10, Lublin 20-031, Poland.
  • Feng X; Centre for mathematical Plasma Astrophysics, KU Leuven, Celestijnenlaan 200B, Leuven 3001, Belgium.
Philos Trans A Math Phys Eng Sci ; 382(2272): 20230218, 2024 Jun 09.
Article em En | MEDLINE | ID: mdl-38679054
ABSTRACT
The cutoff effect is a significant determinant of solar magnetohydrodynamic wave propagation and hence pivotal in energy transfer studies, such as solar plasma heating and seismological diagnostics. Despite continuous efforts, no good agreement between observed waveperiods and theory or numerical simulations was found. Our objective is to investigate the magnetoacoustic cutoff effect in the partially ionized solar atmosphere, factoring in the two-fluid effects. We developed a two-fluid MHD numerical model and used it to simulate a quiet region of the Sun from the top of the convective zone to the low corona. Our findings show that the ongoing granulation excites a wide range of waves propagating into the upper atmospheric layers. The cutoff waveperiods strongly depend on the height. Two-fluid waveperiods obtained with numerical simulations reproduce the recent observations at a very good level of compliance. Furthermore, direct comparison with strongly coupled cases that imitate the single-fluid approximation have shown that the waveperiod propagation pattern is only present in fully two-fluid simulations. We conclude that the presence of neutrals and therefore collisional terms change the dynamics of the magnetized plasma, in comparison with the single-fluid approximation. This effect is more prominently seen in the upper photosphere and chromosphere. This article is part of the theme issue 'Partially ionized plasma of the solar atmosphere recent advances and future pathways'.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Philos Trans A Math Phys Eng Sci Assunto da revista: BIOFISICA / ENGENHARIA BIOMEDICA Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Philos Trans A Math Phys Eng Sci Assunto da revista: BIOFISICA / ENGENHARIA BIOMEDICA Ano de publicação: 2024 Tipo de documento: Article