| Name: | Rohan Kumar |
| Affiliation: | Indian Institute of Science Education and Research Kolkata |
| Conference ID : | ASI2024_37 |
| Title : | Active Region Small-Scale Loops: Unveiling Long-Period Oscillations |
| Authors : | Rohan Kumar, Arpit Kumar Shrivastav, Vaibhav Pant, Dipankar Banerjee |
| Authors Affiliation: | |
| Mode of Presentation: | Poster |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | The solar corona is a dynamic and complex environment, and kink oscillations of coronal loops provide a unique means to probe its underlying physical processes. These oscillations, characterized by their lack of decay, are commonly found in coronal loops. Prior research has found short-period decayless oscillations in these active region small-scale loops. In this work, we report the presence of long-period decayless kink oscillations within small-scale coronal loops in two active regions.
Extreme Ultraviolet Imager (EUI) telescope onboard Solar Orbiter offers us unprecedented spatial and temporal resolution, which is essential to track the oscillations in such small-scale structures. We analyzed two active regions observed by EUI and found around 75 small-scale coronal loops embedded in active regions, which showed signatures of decayless kink oscillations. These loops had an average length of about 20 Mm and oscillation period of about 250 s. The variation of loop length with period shows no correlation, indicating the possibility of wave modes other than standing. We also see that oscillations in these small-scale loops follow a different trend in loop length vs period plot when compared to the oscillations in large-scale loops, which raises intriguing questions about the nature of these oscillations. We found some loops oscillating with periods greater than 5 minutes, suggesting potential coupling with the p-mode driver. |
