| Presentation Title: | A Multi-wavelength Investigation of Quasi-periodic Pulsations an M4.2 Flare: Insights from High-Cadence and High-Resolution Observations |
| Author(s): | William Ashfield, Vanessa Polito, Souvik Bose, Jonas Thoen Faber, Reetika Joshi, Juraj Lörinčík, and Alberto Sainz Dalda |
Abstract:
The response of the lower solar atmosphere during flares is fundamental to understanding flare energy release. As ribbon emission ultimately stems from energy transported from the reconnection site, the characteristic signatures of spectral lines in the chromosphere and transition region offer insight into the energy release process. Here, we present an analysis of such signatures during the 05-03-2023 M4.2-class flare, the first in a series of rapid flares produced from AR13293. Utilizing very high-cadence (1s) observations from the Interface Region Imaging Spectrograph (IRIS), we detect quasi-periodic pulsations (QPPs) in the Si IV and Mg II spectral lines on the order of 20s. A similar periodicity was found in the GOES SXR light curve derivative and HXRs measured by Fermi/GBM, indicating a common driver between the responses. Coordinated observations taken with the CHROMospheric Imaging Spectrometer (CHROMIS) at the Swedish 1m Solar Telescope (SST) provided complimentary, high-spatial-resolution images and spectra of Ca II K (~0.038”/px), where the overall response was found to be similar to that of the IRIS spectra. The multi-wavelength probe of flare ribbon dynamics in this work reveals oscillatory behavior across several atmospheric layers, ranging from the photosphere to the corona, providing a unique insight into the interrelation between energy release signatures.