Hydrodynamic Modeling of Quiet-Sun Coronal Loops

MAC CORMACK, C.; LÓPEZ FUENTES, M.C.; MANDRINI, C.H.; LLOVERAS, D.G.; VÁSQUEZ, A.M.; NIEVES-CHINCHILLA, T.

Chicago

Congreso; American Geophysical Union, Fall Meeting 2022; 2022

The solar corona is structured by magnetic loops, which in the case of active regions can be easily identified in extreme ultraviolet (EUV) and X-ray observations. Due to their poor contrast with the surrounding corona, studying these loops during a minimum of the solar activity cycle and in the quiet-sun becomes a difficult task. In this work we use a technique based on differential emission measure tomography (DEMT) combined with global magnetic field extrapolations, to reconstruct the thermal properties of the plasma along quiet-sun coronal loops. We construct a series of typical loops of different lengths for Carrington Rotation (CR) 2082 and we compare their mean temperature and density profiles with a one-dimensional (1D) hydrodynamic model. We explore different heating regimes and identify which one is more consistent with the thermal properties of the reconstructed loops. We find that while typical loops are too dense with respect to quasi-static equilibrium solutions of the model, impulsive heating localized near the loop footpoints reproduces much better the densities and temperatures observed in shorter and approximately semicircular loops.