Diagnostic of the temperature and differential emission measure (DEM) based on <I>Hinode</I>/XRT data
We discuss here various methodologies and an optimal strategy of the temperature and emission measure diagnostics based on <I>Hinode</I> X-Ray Telescope data. As an example of our results we present the determination of the temperature distribution of the X-rays emitting plasma using...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2008-10-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/26/2999/2008/angeo-26-2999-2008.pdf |
| Summary: | We discuss here various methodologies and an optimal strategy of the
temperature and emission measure diagnostics based on <I>Hinode</I>
X-Ray Telescope data. As an example of our results we present
the determination of the temperature distribution of the X-rays emitting
plasma using a filters ratio method and three various methods of the
calculation of the differential emission measure (DEM). We have
found that all these methods give results similar to the two filters
ratio method. Additionally, all methods of the DEM calculation gave
similar solutions. We can state that the majority of the pairs of
the <I>Hinode</I> filters allows one to derive the temperature and
emission measure in the isothermal plasma approximation using
standard diagnostics based on the two filters ratio method. In cases of
strong flares one can also expect good conformity of the results
obtained using a Withbroe – Sylwester, genetic algorithm and
least-squares methods of the DEM evaluation. |
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| ISSN: | 0992-7689 1432-0576 |