Propagation of Torsional Alfvén Pulses in Zero-beta Flux Tubes

Abstract In this study, we investigate analytically the generation of mass flux due to a torsional Alfvén pulse. We derive that presence waves, which have been observed in, e.g., photospheric magnetic bright points (MBPs), can result in vertical plasma motions. The formation may even be viable contribution chromospheric transport, playing potential roles form localized lower solar atmospheric jets. This relationship is studied using tube model, with waves introduced at boundary as shear perturbation. Due nature MBPs simplify model by zero-beta approximation for inside tube. analytical results are demonstrated an example type wave perturbation one might expect observe, and comparison made properties spicules known from observations. find field-aligned formed nonlinearly Lorentz force generated perturbations, could consistent jet formation, although current not intended determine entire evolution jet. Critical discussion follows, including suggestions improvements high-resolution proposed observations order constrain driving velocity shear.