Análisis DEM 3D de arcos en regiones activas solares.

NUEVO, FEDERICO A.; MANDRINI, CRISTINA H.; ALBERTO M. VASQUEZ; LÓPEZ FUENTES, MARCELO

La Plata, Buenos Aires

Congreso; 58 Reunión Anual de la Asociación Argentina de Astronomía; 2015

Asociación Argentina de Astronomía

The solar corona is hiThe solar corona is highly organized by the magnetic field. Because of their temperature and density, magnetic loops are directly observable in active regions (ARs) in the extreme ultraviolet (EUV) and soft X-ray images. The observational determination of the three-dimensional (3D) distribution of basic physical parameters (electronic density and temperature, and magnetic field) is a fundamental constraint of coronal heating models. In this work we develop a technique of differential emission measure (DEM) analysis and we apply it an EUV loop identified in the images of the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). The DEM is determined after background subtraction and the electronic density and temperature in the loop are estimated from its moments. The 3D structure of the magnetic field in the loop and its intensity are modeled using linear force free field (LFFF) extrapolations based on AR magnetograms. In this work we show preliminary results of this technique.