Simultaneous Yohkoh/SXT and TRACE Observations of Solar Plasma Ejections

TL;DR

This study explores the relationship between hot and warm plasma ejections in the solar corona, revealing consistent associations and temporal sequences during solar flares through combined Yohkoh and TRACE observations.

Contribution

It provides the first comprehensive analysis linking X-ray plasma ejections with EUV counterparts, highlighting the temporal and morphological relationships between hot and warm plasma ejections.

Findings

XPEs are always associated with EUV ejections.

Warm plasma ejections generally start before hot plasma ejections.

Detailed kinematic and morphological analysis of selected events.

Abstract

We investigated the relationship between hot (~10 MK) and warm (~1 MK) plasma ejections observed in the solar corona during some flares from April 1998 to December 2001. Based on the catalog of X-ray Plasma Ejections (XPEs) observed by the Soft X-ray Telescope onboard the Yohkoh satellite, we have identified counterparts of XPEs in extreme-ultraviolet (EUV) images, derived by the TRACE satellite. We found that the XPEs are always associated with the EUV ejections. In most cases, ejections of warm plasma start earlier than ejections of hot plasma. The comprehensive analysis of kinematic and morphology evolution of the most interesting and well-observed events is also given