Transverse oscillations in a coronal loop triggered by a jet

TL;DR

This study observes a jet-triggered transverse oscillation in a solar coronal loop, estimating magnetic field strength and jet velocity, and presents the first seismology analysis linking jet propagation to loop oscillations.

Contribution

It introduces the first coronal loop seismology analysis using jet propagation properties to trigger oscillations, providing new insights into solar magnetic field estimation.

Findings

Transverse oscillation period of about 32 minutes.

Magnetic field inside the loop estimated between 2.68 and 4.5 G.

Jet velocity estimated at 168 km/s for hot component.

Abstract

We detect and analyse transverse oscillations in a coronal loop, lying at the south east limb of the Sun as seen from the \textit{{Atmospheric Imaging Assembly}} (AIA) onboard \textit{{Solar Dynamics Observatory}} (SDO). The jet is believed to trigger transverse oscillations in the coronal loop. The jet originates from a region close to the coronal loop on 19$^{\rm th}$ September 2014 at 02:01:35 UT. The length of the loop is estimated to be between 377-539~Mm. Only one complete oscillation is detected with an average period of about $32\pm5$~min. Using MHD seismologic inversion techniques, we estimate the magnetic field inside the coronal loop to be between $2.68 -4.5$~G. The velocity of the hot and cool components of the jet is estimated to be 168~km~s$^{-1}$ and 43~km~s$^{-1}$, respectively. The energy density of the jet is found to be greater than the energy density of the oscillating coronal loop. Therefore, we conclude that the jet {triggered} transverse oscillations in the coronal loop. To our knowledge, this is the first coronal loop seismology study using the properties of a jet propagation {to trigger} oscillations.