Observations of a rotating macrospicule associated with an X-ray jet

Abstract

<i>Aims. <i/>We attempt to understand the driving mechanism of a macrospicule and its relationship with a coronal jet.<i>Methods. <i/>We study the dynamics of a macrospicule and an associated coronal jet captured by multi-spacecraft observations. Doppler velocities in both the macrospicule and the coronal jet are determined by EIS and SUMER spectra. Their temporal evolution is studied using X-ray and <i>λ<i/>304 images.<i>Results. <i/>A blueshift of km s<sup>-1<sup/> is detected on one side of the macrospicule, while a redshift of km s<sup>-1<sup/> is found at the base of the other side. The inclination angle of the macrospicule inferred from a stereoscopic analysis with STEREO suggests that the measured Doppler velocities can be attributed to a rotating motion of the macrospicule rather than a radial flow or an expansion.<i>Conclusions. <i/>The macrospicule is driven by the unfolding motion of a twisted magnetic flux rope, while the associated X-ray jet is a radial outflow.