Spatially dependent heating and ionization: From CME to ICME

Physics – Plasma Physics

Scientific paper

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[2101] Interplanetary Physics / Coronal Mass Ejections, [2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds, [2164] Interplanetary Physics / Solar Wind Plasma, [7823] Space Plasma Physics / Ionization Processes

Scientific paper

The January 21st 2005 Interplanetary Coronal Mass Ejection (ICME) observed by multiple spacecraft at L1 was also observed further out in the heliosphere at Ulysses (~3.25 AU). Previous multi-spacecraft studies of this ICME found evidence suggesting that the flanks of a magnetic cloud like structure associated with this ICME were observed at L1 while a more central cut through the associated magnetic cloud was observed at Ulysses. This event presents a unique opportunity to study the spatial variation of the ionic composition contained within a single ICME and relate it to the eruption at the Sun. Using SWICS, we compare and contrast the heavy ion composition across the two different observations cuts through the ICME. We will compare the results from ACE and Ulysses with predictions from ionization models in the corona and with remote observations of phenomena indicative of electron heating in the inner corona.

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