Induced MHD oscillations of fine loop structures located in coronal hole

TL;DR

This study investigates MHD oscillations in coronal loop structures within a coronal hole, induced by an eruption event, using EUV observations and wavelet analysis to measure interaction transfer speeds.

Contribution

It presents new observations of eruption-induced oscillations in quiet Sun coronal loops and estimates the transfer speed of the interaction without detecting propagating disturbances.

Findings

Oscillating loops appeared after eruption in coronal bright point

Interaction transfer speed estimated at 2-3 km/s

Eruption likely induced the observed oscillations

Abstract

Many phenomena seen in solar atmosphere are connected with underphotospheric processes. MHD oscillation and other dynamical processes observed in quit sun objects are, for example, these phenomena. In our research we use Stereo Behind EUV(171\AA and 304\AA ) observations to study dynamical processes in quiet Sun regions. We found an eruption event in a coronal bright point on the border of a small coronal hole close to the center of the Solar disk. Several oscillating loops became visible inside of the hole after the eruption. We suppose that these loops oscillation were induced by the eruption process in coronal bright point. The nature of interaction transfer agent is unclear because any propagating disturbance was not detected. For data processing we used Pixelize wavelet filtration (PWF method) and Time-distance plots. We measured the supposed interaction transfer speed and found it about 2-3 km/s. We tried to find out the nature of the interaction transfer agent.