IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Understanding the ejective behavior of an active region throughout five solar rotations
Autor/es:
F. A. IGLESIAS; M. LÓPEZ FUENTES; L. A. MERENDA; C. H. MANDRINI; H. CREMADES; F. M. LÓPEZ
Lugar:
San Juan
Reunión:
Conferencia; Towards Future Research on Space Weather Drivers; 2019
Resumen:
Understanding the ejective behavior of an active region throughout five solar rotationsAbstract: On 2010 a long-duration active region emerged and persisted through five months from July until its decay in November. The quadrature situation of the STEREO spacecraft enabled continuous tracking of the region and identification of the coronal mass ejections originating in it. Using data from the STEREO SECCHI instrument suite, as well as from the Atmospheric Imaging Assembly and the Helioseismic and Magnetic Imager instruments onboard the Solar Dynamics Observatory, we investigate the conditions that gave rise to specific periods of ejective activity in this active region. We determine the locations from which mass ejections originated, and measure the ejections´ angular widths, speed, and mass. The active region behavior, during front-disk passages, is analyzed by following the spatial distribution and evolution of current density, current helicity, and other parameters extracted from customized HMI-SHARP data. The correlations found between the active region photospheric evolution and periods of intense ejective activity, is encouraging to understand the physical mechanisms at work and to improve space weather forecasting.