Observations of a rotating macrospicule associated with an X-ray jet
Abstract
We attempt to understand the driving mechanism of a macrospicule and its relationship with a coronal jet. We study the dynamics of a macrospicule and an associated coronal jet captured by multi-spacecraft observations. Doppler velocities both in the macrospicule and the coronal jet are determined by EIS and SUMER spectra. Their temporal evolution is studied using X-ray and He II 304 images. A blueshift of -120+/-15 km/s is detected on one side of the macrospicule, while a redshift of 50+/-6 km/s 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. The macrospicule is driven by the unfolding motion of a twisted magnetic flux rope, while the associated X-ray jet is a radial outflow.
Cite
@article{arxiv.1001.1924,
title = {Observations of a rotating macrospicule associated with an X-ray jet},
author = {S. Kamio and W. Curdt and L. Teriaca and B. Inhester and S. K. Solanki},
journal= {arXiv preprint arXiv:1001.1924},
year = {2010}
}
Comments
4 pages, 3 figures, accepted for publication in A&A