Decayless kink oscillations of an ensemble of loops are captured simultaneously by the High Resolution Imager (HRI) of the Extreme Ultraviolet Imager (EUI) and the Atmospheric Imaging Assembly (AIA) from 22:58 UT on 5 November to 00:27 UT on 6 November 2021. This is the first time that HRI/EUI detects kink oscillations. During observations, the line-of-sight of SolO and SDO were almost parallel. Oscillations are analysed by processing image sequences taken by the
two instruments with a motion magnification technique. The analysed loops are around 51 Mm in length, and oscillate with relative short periods of 1—3 min and displacement amplitudes of 24—83 km. The signals recorded by AIA are delayed by 66 s as compared to HRI, which is the light travel time difference from the Sun to each instrument. After correction of this time difference, the cross-correlation coefficient between the oscillatory signals detected with HRI
and AIA varies from 0.82 to 0.97, indicating that they are well consistent. This work confirms that HRI sees the same oscillations as AIA, which is the necessary first step before proceeding to the detection of shorter time scales by EUI. In
addition, our results indicate the robustness of the de-jittering procedure in the study of kink oscillations with HRI.

Animation showing the oscillating loops. The amplitudes of transverse motions are magnified by a factor of 3. Link opens in a new window

• Publication: S Zhong, V M. Nakariakov, D Y. Kolotkov, C Verbeeck, D Berghmans, MNRAS, 2022 (accepted)

• DOI: 10.1093/mnras/stac2545