Tracking a long duration active region: flux evolution and ejective aspects

L.A. MERENDA; H. CREMADES; C. H. MANDRINI; M.C. LÓPEZ FUENTES; F. M. LOPEZ; M. POISSON; I. CABELLO

Buenos Aires

Congreso; XI COLAGE; 2018

Coronal Mass Ejections (CMEs) hold the number one place in threats to Earth due to their high capability of perturbing the fragile equilibrium of technology. Despite the fact that many CME triggering mechanisms have been proposed, space weather forecasts are so far not able to predict when a CME will take place in an active region. To improve our knowledge in this respect, we investigate a long-duration active region (AR) throughout its life, along five solar rotations between July and November in 2010, with regard to its ejective productivity and flux evolution. We benefit from the wealth of solar remote-sensing data with improved temporal, spatial, and spectral resolution provided by the ground-breaking space missions STEREO, SDO, and SOHO. The ejective aspect could be uninterruptedly tracked along the entire life of the AR, because the STEREO spacecraft were in a quadrature position with respect to the SDO and SOHO missions, providing multi-viewpoint coronagraphic images. Flux evolution was investigated by means of SDO/HMI data, only possible when the AR was on the front side of the Sun. The ultimate goal of this work in progress is to identify common patterns in the ejective aspect that can be connected with the active region characteristics.