Study of Spicules from Space Observations

I. Kontogiannis, G. Tsiropoula, K. Tziotziou

Institute for Space Applications and Remote Sensing, National Observatory of Athens, 15236, P. Penteli, Greece

We present a study of spicules observed in the northern solar limb using simultaneous, high-resolution observations obtained by the spacecraft HINODE and TRACE during a coordinated campaign. The data sets were reduced and then carefully coaligned in order to compare the observed patterns and topology in this highly dynamical region of the solar atmosphere. In the different spectral bands of the two spacecraft a multitude of spicules is revealed. Their identification allows us to trace their spatial and temporal variation. Persistent plasma motions at certain locations, indicative of the recurrency of some structures, are visible throughout the entire time series. Cuts across and parallel to the limb provide information on these motions and their temporal evolution. Using wavelet and cross-correlation analyses we investigate oscillatory phenomena along the axis of off-limb spicules, as well as along lines parallel to the solar limb, and examine their interconnection with wave propagation.