Speaker
Description
Decayless transverse oscillations of solar coronal loops (or decayless oscillations for short) have attracted great attention since their discovery. Coronal bright points (CBPs) are found to be constituted by small-scale loops. However, the decayless oscillations in CBPs have not been widely reported. In this study, we identified this kind of oscillations in some CBPs using 171 Å images taken by Atmospheric Imaging Assembly (AIA) onboard Solar Dynamics Observatory (SDO). Motion magnification algorithm was used to increase the amplitude, and time-distance diagrams were made to show the oscillatory patterns. We also estimated the loop lengths. Our statistical results show that the average period, displacement amplitude and loop length are about 5 minutes, 0.06 Mm and 22Mm respectively. Moreover, we made a toy model to illustrate how these sub-resolution oscillation amplitudes (less than 0.1 Mm) could be detected. Our study shows that the decayless oscillations also widely exist in small-scale loops of CBPs. And these oscillations might allow for the seismological diagnosing of the quiet-Sun regions.
