Micro-Sigmoids as Progenitors of Polar Coronal Jets

TL;DR

This paper investigates the role of micro-sigmoids in the Sun's corona as the origins of polar coronal jets, providing insights into their structure, dynamics, and potential self-similarity across scales.

Contribution

It introduces the concept that coronal micro-sigmoids are progenitors of jets, linking small-scale structures to larger jet phenomena and explaining their characteristics.

Findings

Jets erupt from S-shaped bright points.

Micro-sigmoids are identified as jet progenitors.

Solar activity shows self-similarity across scales.

Abstract

Observations from the Hinode X-ray telescope (XRT) are used to study the structure of X-ray bright points (XBPs), sources of coronal jets. Several jet events are found to erupt from S-shaped bright points, suggesting that coronal micro-sigmoids are progenitors of the jets. The observations may help to explain numerous characteristics of coronal jets, such as helical structures and shapes. They also suggest that solar activity may be self-similar within a wide range of scales in terms of both properties and evolution of the observed coronal structures.