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| Paper: |
Coronal Loops: New Insights from EIS Observations |
| Volume: |
415, The Second Hinode Science Meeting: Beyond Discovery-Toward Understanding |
| Page: |
264 |
| Authors: |
Del Zanna, G.; Bradshaw, S. J. |
| Abstract: |
Multi-instrument observations of coronal loops of different active regions have been studied. The general features discussed in Del Zanna (2003) and Del Zanna and Mason (2003) based on SOHO/CDS are confirmed. Hinode EIS high-cadence observations clearly show how dynamic loops are at all temperatures. This clearly reflects the fast changes in the photospheric magnetic fields measured by SOT over a minute timescale. Despite that, persistent patterns are present. In particular, the pattern of Doppler shifts and non-thermal widths, found for the first time in NOAA 10926 (cf. Del Zanna 2007, 2008), is actually a common feature in all active regions. It is likely that the majority of cool (0.5–1 MK) loops are observed during their radiatively cooling phase. |
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