Numerical simulations of multiple scattering of the $f-$mode by flux tubes

TL;DR

This study uses numerical simulations to analyze how groups of magnetic flux tubes in the Sun affect surface-gravity waves, revealing the significant impact of multiple scattering on wave absorption and phase shift.

Contribution

It provides new insights into the effects of multiple scattering among flux tubes on wave absorption and phase shifts in the solar atmosphere.

Findings

Multiple scattering significantly affects wave absorption and reduces phase shift.

Absorption increases with the number of flux tubes and decreases in distance between them.

Longer wavelength waves experience enhanced absorption due to multiple scattering.

Abstract

We use numerial simulations to study the absorption and phase shift of surface-gravity waves caused by groups of magnetic flux tubes. The dependence of the scattering coefficients with the distance between the tubes and their positions is analyzed for several cases with two or three flux tubes embedded in a quiet Sun atmosphere. The results are compared with those obtained neglecting completely or partially multiple scattering effects. We show that multiple scattering has a significant impact on the absorption measurements and tends to reduce the phase shift. We also consider more general cases of ensembles of randomly distributed flux tubes, and we have evaluated the effects on the scattering measurements of changing the number of tubes included in the bundle and the average distance between flux tubes. We find that for the longest wavelength incoming waves multiple scattering enhances the absorption, and its efficiency increases with the number of flux tubes and the reduction of the distance between them.