IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Study of scaling laws in quiet-Sun coronal loops
Autor/es:
MARCELO LÓPEZ FUENTES; ALBERTO M. VÁSQUEZ; CRISTINA H. MANDRINI; CECILIA MAC CORMACK; DIEGO G. LLOVERAS
Lugar:
Ciudad de San Juan
Reunión:
Workshop; Towards Future Research on Space Weather Drivers; 2019
Resumen:
Different theoretical studies of active region (AR) plasmas provide relations between the physical parameters of coronal loops, such as temperature, density, loop length and magnetic field. These relations predict particular scaling laws that can be compared with observations (see Mandrini, Demoulin and Klimchuk 2000, ApJ, 530, 999). This task is specially difficult in the case of quiet-Sun loops, since they are not identifiable in observations. In a series of works in recent years (see the review by Vasquez 2016, AdSpR, 57, 1286), a novel coronal tomography procedure was developed that provides, integrated from EUV observations over a solar rotation, the three-dimensional distribution of the mean temperature and density in the coronal volume between 1.02 and 1.225 solar radii. We study the Carrington rotation 2082, a solar rotation during the activity minimum between Solar Cycles 23 and 24. We use data from the Extreme Ultraviolet Image (EUVI) on board the Solar Terrestrial Relations Observatory (STEREO) spacecraft, to perform differential emission measure tomography (DEMT). We obtain loop-averaged electron density and temperature by tracing the DEMT products along the magnetic field lines obtained with a potential-field source-surface (PFSS) extrapolation of a synoptic magnetogram. Also, loop-integrated energy-related quantities are computed for each closed magnetic field line. In this work, we study the relation between observed and inferred parameters of quiet-Sun coronal loops to obtain scaling laws.