Hinode EIS Observations of a Limb Active Region
Brendan O'Dwyer (University of Cambridge)
Tuesday 10th November 2009, 2:00pm (Note the time change!)
Pratt conference room, 60 Garden Street
We have carried out a study of an active region close to the solar limb using observations from the Extreme-ultraviolet Imaging Spectrometer (EIS) and the X-Ray Telescope (XRT) on board Hinode. The electron density and temperature distributions of the coronal emission have been determined using emission line intensity ratios. Differential emission measure (DEM) analysis and the emission measure (EM) loci technique were used to examine the thermal structure of the emitting plasma as a function of distance from the limb. A comparison of EIS and XRT DEM analyses has also been carried out. The highest temperature and electron density values are found to be located in the core of the active region. The plasma along the line of sight in the active region was found to be multi-thermal at different distances from the limb.