Temperature and Density Analysis of a Coronal Loop Using EIS

Details Temperature and Density Analysis of a Coronal Loop Using EIS Temperature and Density Analysis of a Coronal Loop Using EIS

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp31c..02g&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP31C-02

Other

7509 Corona, 7594 Instruments And Techniques

Scientific paper

The temperature analysis of coronal loops has produced contradictory results. Image ratios from TRACE show substantially smaller temperature gradients than predicted by standard models for loops in hydrodynamic equilibrium. TRACE has state-of-the-art spatial resolution but limited temperature coverage. On the other hand, the pixels of the Coronal Diagnostics Spectrometer (CDS) on SOHO are larger but its temperature resolution is state-of-the-art. Loop results from differential emission measure analyses from CDS data have been questioned due to the resolving power. Loop analysis could benefit greatly from observations by an instrument with the spatial resolution of TRACE and the temperature coverage of CDS. A spectrometer with (almost) these characteristics was launched in September 2006 on the Japanese/USA/UK Hinode mission. The EUV Imaging Spectrometer (EIS) is similar to CDS, observing emission lines originating from the solar corona and upper transition region at wavelength intervals in the extreme ultraviolet, but with a spatial resolution that is almost as good as TRACE. Differential emission measure and density analysis is done on the coronal loop data observed by EIS on 01 June 2007. Results from CDS and TRACE analysis are compared and discussed qualitatively. Solar physics research at the University of Memphis is supported by a Hinode subcontract from NASA/SAO as well as NSF ATM-0402729.

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