Observations of a rotating macrospicule associated with an X-ray jet
Solanki, S. K.; Inhester, B.; Curdt, W.; Teriaca, L.; Kamio, S.
Germany, South Korea
Abstract
Aims: We attempt to understand the driving mechanism of a macrospicule and its relationship with a coronal jet.
Methods: 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 He II λ304 images.
Results: A blueshift of -120 ± 15 km s-1 is detected on one side of the macrospicule, while a redshift of 50 ± 6 km s-1 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.
Conclusions: The macrospicule is driven by the unfolding motion of a twisted magnetic flux rope, while the associated X-ray jet is a radial outflow.