Three dimensional reconstruction of the density and temperature along AR loops based on high resolution AIA data

NUEVO, F.A.; VÁSQUEZ, A.M.; MANDRINI, C.H.; LÓPEZ FUENTES, M.C.

Simposio; IAU Symposium 327, Fine structure and dynamics of the solar atmosphere; 2016

Due to their characteristic temperature and density, some magnetic flux tubes in active regions (ARs)can be directly seen as bright loop structures in extreme ultraviolet (EUV) and soft X-ray images. Theobservational determination of the three-dimensional (3D) distribution of basic physical parameters (electronicdensity and temperature, and magnetic field) is a fundamental constraint for coronal heating models.In this work we develop a technique of di↵erential emission measure (DEM) analysis and we apply it toan ensemble of EUV loops identified in images obtained with the Atmospheric Imaging Assembly (AIA)on board the Solar Dynamics Observatory (SDO). The local DEM in points along the loops is determinedafter background subtraction and the electronic density and temperature in the loop are estimated fromits moments. The 3D structure and intensity of the magnetic field that correspond to the observed EUVloops are modelled using linear force free field (LFFF) extrapolations based on AR magnetograms. In thiswork we show the results for several ARs and discuss them in the context of coronal heating models.