The effect of flow on resonant absorption of slow MHD waves in magnetic flux tubes

Abstract

In this paper, we study kink and sausage oscillations in the presence of longitudinal background flow. We study resonant absorption of the kink and sausage modes in the slow continuum under magnetic pore conditions in the presence of flow. we determine the dispersion relation then solve it numerically, and find the frequencies and damping rates of the slow kink and sausage surface modes. We also, obtain analytical solution for the damping rate of the slow surface mode in the long wavelength limit. We show that in the presence of plasma flow, resonance absorption can result in strong damping for forward waves and can be considered as an efficient mechanism to justify the extremely rapid damping of slow surface sausage waves observed in magnetic pores. Also, the plasma flow reduces the efficiency of resonance absorption to damp backward waves. Furthermore, for the pore conditions, the resonance instability is avoided in our model.

References in corpus (16)

• Multiwavelength studies of MHD waves in the solar chromosphere: An overview of recent results
• Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology
• Analytic approximate seismology of transversely oscillating coronal loops
• Hinode/EIS observations of propagating low-frequency slow magnetoacoustic waves in fan-like coronal loops
• Damping of filament thread oscillations: effect of the slow continuum
• Cool and hot components of a coronal bright point
• Spatial Damping of Propagating Kink Waves Due to Resonant Absorption: Effect of Background Flow
• Waves in Solar Coronal Loops
• The behavior of transverse waves in nonuniform solar flux tubes. II. Implications for coronal loop seismology
• Upflows in funnel-like legs of coronal magnetic loops
• Resonant absorption of surface sausage and surface kink modes under photospheric conditions
• Analytic approximate seismology of propagating MHD waves in the solar corona
• Resonant absorption of kink magnetohydrodynamic waves by a magnetic twist in coronal loops
• Ultra-high-resolution Observations of MHD Waves in Photospheric Magnetic Structures
• Observations of apparent superslow wave propagation in solar prominences
• The effect of magnetic twist on resonant absorption of slow sausage waves in magnetic flux tubes

Cited by in corpus (4)

• The Effect of Flow and Magnetic Twist on Resonant Absorption of Slow MHD Waves in Magnetic Flux Tubes
• Transverse kink oscillations of inhomogeneous prominence threads: numerical analysis and H$\alpha$ forward modelling
• Dissipative Instability of Magnetohydrodynamic Sausage Waves in a Compressional Cylindrical Plasma: Effect of Flow Shear and Viscosity Shear
• Effects of external flow on resonant absorption of coronal loop kink oscillations driven by an external fast wave: Selective excitation problem