Other
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640713s&link_type=abstract
American Astronomical Society, AAS Meeting #216, #407.13; Bulletin of the American Astronomical Society, Vol. 41, p.861
Other
Scientific paper
Data from the X-Ray Telescope (XRT) and the EUV Imaging Spectrometer (EIS) on Hinode were used to investigate the spatial and thermal properties of an isolated quiescent coronal loop. We constructed Differential Emission Measure (DEM) curves using Monte Carlo based reconstruction algorithms. We studied the loop as a whole, in segments, in transverse cuts, and point-by-point, always with some form of background subtraction, and find that the loop DEM is neither isothermal nor extremely broad, with 96% of the EM between 6.2 < log T < 6.7, and an EM weighted average temperature of log T = 6.48 +/- 0.16. We find evidence for a gradual change in temperature along the loop, with log T increasing by 0.1 from the footpoints to the peak. The combined XRT-EIS data can do a good job of constraining the temperature distribution for coronal loop plasma, but strong high- and low- temperature constraints are crucial. Solar physics research at the University of Memphis is supported by a Hinode subcontract from NASA/SAO as well as NSF ATM-0402729.
Kashyap Vinay
Saar Steve
Schmelz Joan T.
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