Quantitative, Three-dimensional Analysis of the Global Corona with Multi-spacecraft Differential Emission Measure Tomography
Abstract
A previous paper (Frazin et al. 2005b) introduced the concept of differential emission measure tomography (DEMT), which is a three-dimensional (3D) extension of the classical differential emission measure technique for determining the distribution of temperatures in a volume of plasma. The information for the reconstruction in the three spatial dimensions is provided by solar rotation and/or multi-spacecraft views. This paper describes, quantitatively, the procedure for implementing DEMT with data from NASA's STEREO/EUVI instrument, including the radiometry, line-of-sight geometry, and image preparation steps. An example of a quantitative, multiband, 3D reconstruction and local differential emission measure curves are given, and it is demonstrated that, when applicable, DEMT is a simple 3D analysis tool that obviates the need for structure-specific modeling.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2009
- DOI:
- 10.1088/0004-637X/701/1/547
- Bibcode:
- 2009ApJ...701..547F
- Keywords:
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- Sun: corona;
- Sun: prominences;
- Sun: UV radiation