Coronal Mini-jets in an Activated Solar Tornado-like Prominence
Huadong Chen, Jun Zhang, Bart De Pontieu, Suli Ma, Bernhard Kliem, and, Eric Priest

TL;DR
This study analyzes small, dynamic coronal jets from a solar tornado-like prominence using high-resolution IRIS data, revealing their physical properties, thermal nature, and likely magnetic reconnection origins, with implications for solar eruption mechanisms.
Contribution
First detailed statistical analysis of mini-jets in a tornado-like prominence, characterizing their physical parameters and proposing magnetic reconnection as their formation mechanism.
Findings
Mini-jets have lengths of 1.0-6.0 Mm and lifetimes of 10-50 s.
Jets are multi-thermal with an average temperature of ~2.6×10^5 K.
Reconnection events likely produce the mini-jets, influencing prominence stability.
Abstract
High-resolution observations from the () reveal the existence of a particular type of small solar jets, which arose singly or in clusters from a tornado-like prominence suspended in the corona. In this study, we perform a detailed statistical analysis of 43 selected mini-jets in the tornado event. Our results show that the mini-jets typically have: (1) a projected length of 1.0-6.0 Mm, (2) a width of 0.2-1.0 Mm, (3) a lifetime of 10-50 s, (4) a velocity of 100-350 km s, and (5) an acceleration of 3-20 km s. Based on spectral diagnostics and EM-Loci analysis, these jets seem to be multi-thermal small-scale plasma ejections with an estimated average electron density of 2.4 10 cm and an approximate mean temperature of 2.6 10 K. Their mean kinetic energy density, thermal energy…
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