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Abstract: We attempt to understand the driving mechanism of a macrospicule and itsrelationship with a coronal jet. We study the dynamics of a macrospicule and anassociated coronal jet captured by multi-spacecraft observations. Dopplervelocities both in the macrospicule and the coronal jet are determined by EISand SUMER spectra. Their temporal evolution is studied using X-ray and He II304 images. A blueshift of -120+-15 km-s is detected on one side of themacrospicule, while a redshift of 50+-6 km-s is found at the base of the otherside. The inclination angle of the macrospicule inferred from a stereoscopicanalysis with STEREO suggests that the measured Doppler velocities can beattributed to a rotating motion of the macrospicule rather than a radial flowor an expansion. The macrospicule is driven by the unfolding motion of atwisted magnetic flux rope, while the associated X-ray jet is a radial outflow.



Author: S. Kamio, W. Curdt, L. Teriaca, B. Inhester, S. K. Solanki

Source: https://arxiv.org/







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