Simultaneous Observations of the Chromosphere with TRACE and SUMER

TL;DR

This study presents simultaneous TRACE and SUMER observations of a transient chromospheric loop, revealing dynamic velocities and potential connections to extended structures or jets, enhancing understanding of solar chromospheric phenomena.

Contribution

It provides the first combined high-resolution imaging and spectroscopic analysis of a transient chromospheric loop in the UV spectrum.

Findings

Detection of significant Doppler velocities above the loop

Evidence of extended non-visible loops or jet bases

Correlation between TRACE imaging and SUMER spectroscopy

Abstract

Using mainly the 1600 angstrom continuum channel, and also the 1216 angstrom Lyman-alpha channel (which includes some UV continuum and C IV emission), aboard the TRACE satellite, we observed the complete lifetime of a transient, bright chromospheric loop. Simultaneous observations with the SUMER instrument aboard the SOHO spacecraft revealed interesting material velocities through the Doppler effect existing above the chromospheric loop imaged with TRACE, possibly corresponding to extended non-visible loops, or the base of an X-ray jet.