Bibcode
Joshi, Reetika; Thoen Faber, Jonas; Rouppe van der Voort, Luc; Wedemeyer, Sven; Fletcher, Lyndsay; Aulanier, Guillaume; Nóbrega-Siverio, Daniel
Referencia bibliográfica
American Astronomical Society Meeting Abstracts
Fecha de publicación:
6
2025
Número de citas
0
Número de citas referidas
0
Descripción
Solar flares predominantly release their luminous energy in the chromosphere, where flare ribbons mark the footpoints of energy deposition and provide key insights into magnetic reconnection processes. Using high-resolution imaging and spectral observations, we examined fine structures within flare ribbons in a GOES C2.4 class solar flare observed with SST, IRIS, and SDO. Chromospheric bright blobs were analyzed in Ca II 8542 Å, Hα, and Hβ, with additional comparisons between Hβ and Si IV 1400 Å. These nearly circular blobs, measuring 140–200 km in width, exhibit red wing asymmetries in their intensity profiles. High-resolution Hβ observations reveal a periodic arrangement of blobs, spaced 330–550 km apart, suggesting fragmented reconnection within a flare current sheet. Our findings provide the highest-resolution evidence to date of fine-structure flare ribbons and their direct link to current sheet tearing in the corona.