Evolución de la Estructura Térmica Global de la Corona alrededor del Ultimo Mínimo de Actividad Solar

NUEVO, FEDERICO A.; VÁSQUEZ, ALBERTO M.; HUANG, ZHENGUANG; FRAZIN, RICHARD A.

Mar del Plata

Congreso; 55 Reunión Anual de la Asociación Argentina de Astronomía; 2012

AAA

We study the solar corona temperature structure during several Carrington rotations (CR) around the last minimum of solar activity(CR-2077). The combination of Differential Emission Measure Tomography (DEMT) with magnetic models allows determination of the electron density and electron temperature along individual magnetic field lines. Two types of quiet Sun (QS) coronal loops were identified: “up” loops in which the temperature increases with height, and “down” loops in which the temperature decreases with height. We find that the population of up loops dominates the intermediate latitudes, while down loops are always located in the low-latitude region. We also find that the population of down loops was maximum at solar minimum.