Scaling laws of quiet-Sun coronal loops

MAC CORMACK, C.; LÓPEZ FUENTES, M.C.; MANDRINI, C.H.; VÁSQUEZ, A.M.

Conferencia; XI Conferencia Latinoamericana de Geofísica Espacial (XI COLAGE); 2018

Different coronalheating models predict particular relations between physical parameters ofmagnetic loops, such as temperature, density, loop length and magnetic field.These relations and the expected scaling laws obtained from them have beenpreviously compared with observations in the case of coronal loops from activeregions (ARs) (see Mandrini, Demoulin and Klimchuk 2000, ApJ, 530, 999). Untilrecently, the lack of a direct identification of loops in observations of thequiet-Sun corona made it very difficult to perform this kind of studies outsideARs. In a series of recent works (see the review by Vasquez 2016, AdSpR, 57,1286), a novel coronal tomography procedure was developed that provides,integrated from EUV observations along a solar rotation, the three-dimensionaldistribution of the mean temperature and density in the coronal volume between1.02 and 1.225 solar radii. The tomographic results are combined with potentialmagnetic field extrapolations to obtain the mean temperature and density of theplasma along field lines integrated from the magnetic model. In thispreliminary work, we study the scaling laws between observed and inferredparameters of coronal loops reconstructed from the tomography and magneticmodel combination for Carrington rotation 2081 (see Mac Cormack et al. 2017,ApJ, 843, 70). The obtained scaling laws are compared with expected relationsaccording to the most widely known models of coronal heating.