A Catalogue of Solar X-ray Plasma Ejections observed by the Soft X-ray Telescope onboard YOHKOH

TL;DR

This paper presents a comprehensive catalogue of 368 Solar X-ray Plasma Ejections observed over a decade, introduces a new classification scheme, and explores their relationship with flares and CMEs, highlighting their diverse nature and potential as CME precursors.

Contribution

It provides a new detailed catalogue of XPEs, including 163 previously unreported events, and proposes a novel classification based on morphology, kinematics, and recurrence.

Findings

XPEs are highly inhomogeneous, indicating different underlying processes.

Erupting loop-like XPEs may serve as high-temperature CME precursors.

The catalogue links XPE subclasses with associated solar events.

Abstract

A catalogue of X-ray Plasma Ejections (XPEs) observed by the Soft X-ray Telescope onboard the YOHKOH satellite has been recently developed in the Astronomical Institute of the University of Wroc{\l}aw. The catalogue contains records of 368 events observed in years 1991-2001 including movies and crossreferences to associated events like flares and Coronal Mass Ejections (CMEs). 163 XPEs from 368 in the catalogue were not reported until now. A new classification scheme of XPEs is proposed in which morphology, kinematics, and recurrence are considered. The relation between individual subclasses of XPEs and the associated events was investigated. The results confirm that XPEs are strongly inhomogeneous, responding to different processes that occur in the solar corona. A subclass of erupting loop-like XPEs is a promising candidate to be a high-temperature precursor of CMEs.