Solar minimum streamer densities and temperatures using Whole Sun Month coordinated data sets

S. E. Gibson, A. Fludra, F. Bagenal, D. Biesecker, G. Del Zanna, B. Bromage

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137 Scopus citations

Abstract

We model electron densities of the simplest, most symmetric solar minimum streamer structure observed during the Whole Sun Month (WSM) campaign, using coronal observations of both visible white light and extreme ultraviolet (EUV) emission. Using white light data from the SOHO/LASCO/C2 and HAO/ Mauna Loa Mark 3 coronagraphs, we determine electron densities by way of a Van de Hulst inversion. We compare the white light densities to those determined from the density sensitive EUV line ratios of Si IX 350/342 Å observed by the SOHO/coronal diagnostic spectrometer (CDS). Moreover, from the white light density profiles we calculate hydrostatic temperature profiles and compare to temperatures derived from the Si XII/Mg X line ratio. We find the white light and spectral analysis produce consistent density and temperature information.

Original languageEnglish
Article number98JA02681
Pages (from-to)9691-9699
Number of pages9
JournalJournal of Geophysical Research: Space Physics
Volume104
Issue numberA5
DOIs
StatePublished - May 1 1999

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