Quasi-mode damping in two-dimensional fully non-uniform coronal loops

Area of Science:

• Plasma physics
• Astrophysics
• Magnetohydrodynamics

Background:

• Coronal loop oscillations are crucial for understanding solar flares and coronal heating.
• Previous models often simplified plasma density variations within coronal loops.

Purpose of the Study:

• To compute resonantly damped fast kink quasi-modes in resistive magnetohydrodynamics.
• To analyze the influence of non-uniform plasma density on oscillation characteristics.

Main Methods:

• Utilized fully resistive magnetohydrodynamics (MHD).
• Employed two-dimensional equilibrium models with non-uniform plasma density across and along flux tubes.
• Investigated straight, cylindrically symmetric flux tubes.

Main Results:

• Oscillation period and damping are primarily determined by density contrast and inhomogeneity scale.
• Longitudinal stratification details do not significantly affect these parameters.
• Results are applicable to density variations spanning the entire loop.

Conclusions:

• Provides a more comprehensive model for coronal loop oscillations.
• Enhances the ability to compare theoretical predictions with observational data.
• Highlights the importance of density contrast and inhomogeneity in oscillation dynamics.