ICATE 21876
INSTITUTO DE CIENCIAS ASTRONOMICAS, DE LA TIERRA Y DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
"Spatial distribution and statistical properties of small-scale convective vortex-like motions in a quiet sun region."
Autor/es:
VARGAS-DOMÍNGUEZ, S.; PALACIOS, J.; BALMACEDA, L. A.; CABELLO, I.; DOMINGO,V.
Revista:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2011
ISSN:
0035-8711
Resumen:
High-resolution observations of a quiet Sun internetwork region taken with the Solar 1-m Swedish Telescope in La Palma are analyzed.We determine the location of small-scale vortex motions in the solar photospheric region by computing the horizontal propermotions of small scale structures on time series of images. These plasma convectively-driven swirl motions are associated to: (1) downdrafts (that have been commonly explained as corresponding to sites where the plasma is cooled down and hence returned to the interior below the visible photospheric level), and (2) horizontal velocity vectors converging into a central point. The sink cores are proved to be the final destination of passive floats tracing plasma flows towards the center of each vortex.We establish the occurrence of these events to be 1.4x10^(-3) and 1.6x10^(-3) vortices Mm^(-2) min^(-1) respectively for two time series analyzed here.
