Prominence Oscillations activated by an EUV wave

TL;DR

This study analyzes prominence oscillations triggered by an EUV wave, using multi-wavelength data to measure oscillation periods and infer magnetic field strengths in solar prominences.

Contribution

It provides new measurements of prominence oscillation periods and magnetic fields associated with EUV wave-triggered oscillations.

Findings

Oscillation periods range from 14 to 22 minutes.

Magnetic field strengths are estimated between 14 and 20 Gauss.

EUV wave triggers prominence oscillations.

Abstract

Prominence oscillations are one of interesting phenomena in the solar atmosphere, which can be utilized to infer the embedded magnetic field magnitude. We present here the transverse oscillations of two different prominences located at the East solar limb on 2011 February 11 using the multi-wavebands data of the Atmospheric Imaging Assembly (AIA) on-board the Solar Dynamics Observatory (SDO) satellite. A prominence eruption was observed towards the east direction with an average speed of ~275 km/s. The eruption is fitted with the combination of a linear and an exponential functions of time. An extreme ultraviolet (EUV) wave event was associated with the prominence eruption. This EUV wave triggered the oscillations of both prominences on the East limb. We computed the period of each prominence using the wavelet analysis method. The oscillation period varies from 14 to 22 min. The magnetic field of the prominences was derived, which ranges from 14 to 20 G.