Measurements of Solar Magnetic Element Motion from High‐Resolution Filtergrams

Abstract

Solar photospheric oweld properties on scales are measured using local correlation tracking sub-0A.5 (LCT) and object tracking of magnetic bright points (MBPs : photospheric bright points associated with magnetic elements). The dataset is a 70 minute time series of cospatial and cotemporal G-band 4305 and wideband 4686 ltergrams obtained with the 50 cm Swedish Vacuum Solar Telescope on the island of La Palma, Spain. We examine a 29A ] 70A eld of view (FOV) near disk center and compare a 29A ] 29A magnetic network subeld and a 27A ] 27A apparently nonmagnetic "" quiet-Sun subeld. The mean time between frames is 23.75 s. Each frame is created by partitioned phase-diverse speckle restoration of three image pairs acquired rapidly in sequence. Angular resolution is or less in all frames D0A.4 of the restored data set.