Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona

Two competing theories, the wave theory and reconnection theory, provide explanations for solar corona heating, supported by observations of wave phenomena and magnetic reconnection on the Sun. Plasma β, the ratio of thermal plasma pressure to magnetic pressure, varies significantly in the solar cor...

Full description

Saved in:
Bibliographic Details
Main Authors: Naser Karimi, Mahdi Alizadeh, Zianab Shajei
Format: Article
Language:English
Published: Damghan university 2024-01-01
Series:Iranian Journal of Astronomy and Astrophysics
Subjects:
Online Access:https://ijaa.du.ac.ir/article_455_293826e9a0d99ecf9b446c6b1fa7e1a5.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1841554984767848448
author Naser Karimi
Mahdi Alizadeh
Zianab Shajei
author_facet Naser Karimi
Mahdi Alizadeh
Zianab Shajei
author_sort Naser Karimi
collection DOAJ
description Two competing theories, the wave theory and reconnection theory, provide explanations for solar corona heating, supported by observations of wave phenomena and magnetic reconnection on the Sun. Plasma β, the ratio of thermal plasma pressure to magnetic pressure, varies significantly in the solar corona, influencing wave propagation Throughout much of the corona, the plasma β is considerably smaller than one, to disregard pressure gradients in the plasma. However, plasma β fluctuates throughout the entire region due to the varying magnetic field, such that near null points, the magnetic field diminishes, leading to a potential increase in plasma β. This study focuses on Alfvén pulses interacting with a 2D magnetic null point, investigating the nonlinear effects of plasma beta adjustment in different layers. The study utilizes the PLUTO code, a sophisticated shock-capturing numerical framework, to model the interactions of Alfvén pulses under varying plasma β conditions. The simulations are conducted on high-resolution Cartesian grids with zero-gradient boundary conditions to ensure accuracy. By solving the magnetohydrodynamic (MHD) equations, the analysis reveals temporal fluctuations in the system’s response, with certain instances characterized by higher amplitudes and sharper peaks, indicative of intensified interactions of the Alfvén pulse. The variations in amplitude and peak sharpness underscore the dynamic nature of the system, with certain moments displaying stronger responses than others. On the one hand, when we adjust the plasma beta closer to the null point, the changes in radial velocity and density disturbance decrease, and over time, the wave energy is released more rapidly along the field lines. Density and velocity changes depend on plasma β and proximity to the null point, emphasizing the system’s sensitivity to these parameters. Therefore, it is essential to consider atmospheric conditions for accurate energy transfer assessments.
format Article
id doaj-art-05e107615fc94b75af3a46114bfde591
institution Kabale University
issn 2322-4924
2383-403X
language English
publishDate 2024-01-01
publisher Damghan university
record_format Article
series Iranian Journal of Astronomy and Astrophysics
spelling doaj-art-05e107615fc94b75af3a46114bfde5912025-01-08T06:27:16ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2024-01-0111321322910.22128/ijaa.2025.912.1198455Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the CoronaNaser Karimi0Mahdi Alizadeh1Zianab Shajei2Department of Physics Education, Frahangian University, P.O.Box 14665-889, Tehran, IranIndependant researcher, Tabriz, IranDepartment of Physics Education, Frahangian University, P.O.Box 14665-889, Tehran, IranTwo competing theories, the wave theory and reconnection theory, provide explanations for solar corona heating, supported by observations of wave phenomena and magnetic reconnection on the Sun. Plasma β, the ratio of thermal plasma pressure to magnetic pressure, varies significantly in the solar corona, influencing wave propagation Throughout much of the corona, the plasma β is considerably smaller than one, to disregard pressure gradients in the plasma. However, plasma β fluctuates throughout the entire region due to the varying magnetic field, such that near null points, the magnetic field diminishes, leading to a potential increase in plasma β. This study focuses on Alfvén pulses interacting with a 2D magnetic null point, investigating the nonlinear effects of plasma beta adjustment in different layers. The study utilizes the PLUTO code, a sophisticated shock-capturing numerical framework, to model the interactions of Alfvén pulses under varying plasma β conditions. The simulations are conducted on high-resolution Cartesian grids with zero-gradient boundary conditions to ensure accuracy. By solving the magnetohydrodynamic (MHD) equations, the analysis reveals temporal fluctuations in the system’s response, with certain instances characterized by higher amplitudes and sharper peaks, indicative of intensified interactions of the Alfvén pulse. The variations in amplitude and peak sharpness underscore the dynamic nature of the system, with certain moments displaying stronger responses than others. On the one hand, when we adjust the plasma beta closer to the null point, the changes in radial velocity and density disturbance decrease, and over time, the wave energy is released more rapidly along the field lines. Density and velocity changes depend on plasma β and proximity to the null point, emphasizing the system’s sensitivity to these parameters. Therefore, it is essential to consider atmospheric conditions for accurate energy transfer assessments.https://ijaa.du.ac.ir/article_455_293826e9a0d99ecf9b446c6b1fa7e1a5.pdfsunmagnetohydrodynamicsalfven pulsesmagnetic null pointplasma beta
spellingShingle Naser Karimi
Mahdi Alizadeh
Zianab Shajei
Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona
Iranian Journal of Astronomy and Astrophysics
sun
magnetohydrodynamics
alfven pulses
magnetic null point
plasma beta
title Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona
title_full Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona
title_fullStr Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona
title_full_unstemmed Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona
title_short Investigating the Sensitivity of Alfvén Pulse Interactions to Plasma Beta in the Corona
title_sort investigating the sensitivity of alfven pulse interactions to plasma beta in the corona
topic sun
magnetohydrodynamics
alfven pulses
magnetic null point
plasma beta
url https://ijaa.du.ac.ir/article_455_293826e9a0d99ecf9b446c6b1fa7e1a5.pdf
work_keys_str_mv AT naserkarimi investigatingthesensitivityofalfvenpulseinteractionstoplasmabetainthecorona
AT mahdializadeh investigatingthesensitivityofalfvenpulseinteractionstoplasmabetainthecorona
AT zianabshajei investigatingthesensitivityofalfvenpulseinteractionstoplasmabetainthecorona