Active Region 1 MK Loops: EIS vs. SOHO/CDS Observations

Details Active Region 1 MK Loops: EIS vs. SOHO/CDS Observations Active Region 1 MK Loops: EIS vs. SOHO/CDS Observations

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..397...87d&link_type=abstract

First Results From Hinode ASP Conference Series, Vol. 397, Proceedings of the conference held 20-24 August, 2007, at Trinity Col

Astronomy and Astrophysics

Astronomy

4

Scientific paper

I briefly discuss some of the capabilities of the EIS spectrometer (compared to those of SOHO/CDS), the status of atomic calculations, and some characteristics of quiescent active regions as observed in the corona, with emphasis on loop structures. Previous CDS measurements are confirmed by EIS. However, the high spectral resolution of EIS is providing us with a new, dynamic view of active region loops. One active region showed ubiquitous downflows in loops at all temperatures. Upflows are instead found in small dark areas outside the loop system, where high non-thermal broadening is present. Loops seem to be cooling structures, perhaps the result of slow flux emergence and reconnection.

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