Brueckner Events Oscillations in Solar Transition Region

We study Brueckner event Oscillations in Solar Transition Region (TR), with simultaneous observations from the Si IV 1402A spectra and slit-jaw images (SJI) 1400 A based on the Interface Region Imaging Spectrograph (IRIS), on August 17 and January 27, 2014. Studying of these events can significantly help us understand the mechanisms of the mass and energy transporting from chromosphere toward TR and corona. We obtained intensity profiles from spectrum perpendicular to the slit in three altitudes from the limb, and then by fitting Gaussian intensity profiles, the transverse uctuations up to 3200 km altitude along the slit were computed. We observed that Si IV spectra shows blue and red wing enhancements in the line profiles indicating upward and downward twisted. Average of Doppler velocities in the first and second data for the three altitudes were obtained 35 and 80 km s-1 respectively. The results of wavelet analysis of uctuations revealed dominant periods of 1.5, 3, and 5 minutes. Since the spicules are located almost along the slit of the IRIS telescope, it can be concluded that the uctuations along the line of sight are evidence for kink and twisted Alfvenic supper and hyper sonic waves propagations.