Spectroscopic Diagnostics of Polar Coronal Plumes

TL;DR

This paper reviews spectroscopic observations of polar coronal plumes from space telescopes, analyzing plasma properties like density, temperature, and composition to enhance understanding of solar atmospheric structures.

Contribution

It provides new insights into plasma characteristics of polar coronal plumes using data from SUMER/SOHO and EUVI/STEREO, advancing solar atmospheric research.

Findings

Deduced densities and temperatures of plumes and inter-plume regions.

Identified abundance anomalies in coronal plumes.

Discussed implications for solar atmospheric models.

Abstract

Polar coronal plumes seen during solar eclipses can now be studied with space-borne telescopes and spectrometers. We briefly discuss such observations from space with a view to understanding their plasma characteristics. Using these observations, especially from SUMER/SOHO, but also from EUVI/STEREO, we deduce densities, temperatures, and abundance anomalies in plumes and inter-plume regions, and discuss their implications for better understanding of these structures in the Sun's atmosphere.