Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...628.1070f&link_type=abstract
The Astrophysical Journal, Volume 628, Issue 2, pp. 1070-1080.
Astronomy and Astrophysics
Astronomy
18
Sun: Corona, Sun: Uv Radiation, Techniques: Image Processing
Scientific paper
Conventional differential emission measure (DEM) analysis allows one to determine the amount of plasma as a function of temperature along a given line of sight. A completely different technique called solar rotational tomography (SRT) exploits the view angles provided by solar rotation to determine the spatial distribution of emissivity in three dimensions. These two techniques can be combined in a procedure called differential emission measure tomography (DEMT) to determine the DEM at each point in the corona with the same spatial resolution as can normally be achieved by SRT. In this paper the theory of DEMT is presented, and numerical examples based on the Atmospheric Imaging Assembly (AIA) are given. The results demonstrate promising potential for the methods to be adapted for use with other EUV and X-ray imaging and/or spectroscopy instruments.
Frazin Richard A.
Kamalabadi Farzad
Weber Mark A.
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