Mid-IR observations of a C2 flare: Characterizing the flare dynamics at Chromospheric heights

LÓPEZ, FERNANDO M.; GIMÉNEZ DE CASTRO, CARLOS GUILLERMO; MANDRINI, C.H.; SIMÕES, PAULO J. A.; CRISTIANI, G.D.; GARY, DALE E.; FRANCILE, CARLOS

Reunión virtual

Conferencia; SolFER (Solar Flare Energy Release) Spring 2021 Meeting; 2021

Solar flare observations at mid infrared (MID-IR) wavelengths is a relatively new tool that allows to understand the dynamics of flares at chromosphericheights. We present the analysis of a C2.0 class flare, which was observed at the frequency of 30 THz (7.5-13 m) with a commercial thermal cameraattached to the focus of a Newtonian 20-cm telescope. In order to characterize the temporal evolution of the flare emission, we compare our Mid-IRobservations with data from multiple wavelengths and instruments including ultraviolet emission, soft X-rays, microwaves and H images. The 30 THzemission shows an excellent temporal and spatial agreement with the other chromospheric passbands, such as 1600 and 1700 AA observed by AIA. Nowhite light emission was detected. The event presents two bright sources in the Mid-IR, which can be spatially associated with several bright kernelsobserved in UV. At microwaves the event can be characterized as an optically thin thermal source. We use magnetograms and UV images to reconstructthe magnetic field configuration and evolution. Based on all this information, we discuss possible mechanisms of energy transport related to the origin ofthe chromospheric emission.