Eyecciones coronales de masa asociadas a una región superactiva

CREMADES, H.; LÓPEZ, FERNANDO M.; MANDRINI, C.H.; GULISANO, A.M.; FRANCILE, C.N.; CRISTIANI, G.D.; GUTIERREZ ESCATE, M.V.

Congreso; 60va Reunión Anual de la Asociación Argentina de Astronomía; 2017

During its transit through central meridian, and for four consecutive days, from 13 to 16 February2011, the active region NOAA AR 11158 generated coronal mass ejections (CMEs) in association with wavesobserved in the extreme ultra-violet (EUV) low corona, and even with a chromospheric Moreton wave. Onthose dates, the spacecraft of the STEREO mission were located in quadrature with SOHO and SDO, enablingexceptional observation of these Earth-directed events. In this work the CMEs and interplanetary counterpartsare analyzed by means of multiple viewpoints and wavelengths. The results show that the CMEs under study donot show morphological resemblance in coronagraphic observations, despite having been produced in the sameactive region and close in time. Moreover, low-frequency radio emissions registered by the instrument Wavesaboard the Wind spacecraft allowed the tracking of some of these events in the interplanetary medium.