TL;DR
This paper discusses recent discoveries of torsional Alfvén waves in solar spicules and reinterprets older observations to support these findings, enhancing understanding of solar atmospheric dynamics.
Contribution
It introduces the observation of torsional Alfvén waves in Type-II spicules and reinterprets past data in this context, providing new insights into solar spicule behavior.
Findings
Detection of torsional Alfvén waves in spicules
Reinterpretation of older spectral observations
Enhanced understanding of spicule dynamics
Abstract
Type-II solar spicules appear as long, thin, highly dynamic strands of field-tied matter that feed significant mass and energy to the corona and solar wind. A recent result is that they exhibit torsional Alfv\'en waves in addition to accelerating outflows and swaying motions due to transverse Alfv\'enic waves. I summarize this finding and then re-interpret older observations in its light: the striking similarity of near-limb scenes in the outer blue and red wings of H\alpha, and the tilts of absorption lines with respect to emission lines in eclipse spectra taken in 1973.
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Taxonomy
TopicsSolar and Space Plasma Dynamics · Stellar, planetary, and galactic studies · Astro and Planetary Science