Determinación de la masa evacuada en una región de oscurecimiento coronal y su relación con la masa de su CME asociada.

LÓPEZ, FERNANDO M.; CREMADES, HEBE; NUEVO, FEDERICO A.; BALMACEDA, LAURA; ALBERTO M. VASQUEZ

La Plata, Buenos Aires

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

Asociación Argentina de Astronomía

Coronal dimmings are regions in the low corona characterized by depletions in the coronal EUV and X-ray intensity. Dimmings are usually related to the loss of plasma and magnetic fields asociated with the eruption of a Coronal Mass Ejection (CME). In this work we present a study of the temporal evolution for the mass loss of a dimming event observed in EUV wavelengths on 23 May 2010. The study of the mass loss was performed using EUV images obtained by the Atmospheric Imaging Assembly instrument on board the Solar Dynamics Observatory (AIA/SDO). For the estimation of the plasma electronic density in the low corona, we used a Differential Emission Measure technique. On the other hand, we used coronographic data from the STEREO mission to estimate the temporal evolution of the mass for the asociated CME in white light. The obtained results show that the mass loss of the dimming represents 67.5% of the associated CME mass determined using white light data, which accounts for a considerable amount of the CME mass.