Tempurature Tomography of the Soft X‐Ray Corona: Measurements of Electron Densities, Tempuratures, and Differential Emission Measure Distributions above the Limb

2001 ◽  
Vol 550 (1) ◽  
pp. 475-492 ◽  
Author(s):  
Markus J. Aschwanden ◽  
Loren W. Acton
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure ◽  
Electron Densities ◽  
X Ray

scholarly journals First Determinations of Differential Emission Measure Distribution from RESIK X-ray Spectra

2004 ◽  
Vol 2004 (IAUS223) ◽  
pp. 461-462 ◽  
Author(s):  
A. K[ecedilla]pa ◽  
J. Sylwester ◽  
B. Sylwester ◽  
M. Siarkowski
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure ◽  
X Ray ◽  
Measure Distribution

scholarly journals Overview of XRT performance and first results

2007 ◽  
Vol 3 (S247) ◽  
pp. 326-336
Author(s):  
Antonia Savcheva ◽  
Keyword(s):  
Fine Structure ◽  
Coronal Holes ◽  
Emission Measure ◽  
Active Regions ◽  
Potential Fields ◽  
Differential Emission Measure ◽  
Short Introduction ◽  
X Ray ◽  
First Results ◽  
Measure Analysis

AbstractIn this review we present a short introduction to the X-ray Telescope on Hinode. We discuss its capabilities and new features and compare it with Yohkoh SXT. We also discuss some of the first results that include observations of X-ray jets in coronal holes, shear change in flares, sigmoid eruptions and evolution, application of filter ratios and differential emission measure analysis, structure of active regions, fine structure of X-ray bright points, and modeling non-potential fields around filaments. Finally, we describe how XRT works with other ground and space-based instrumentation, in particular with TRACE, EIS, SOT, and SOLIS.

scholarly journals The X-Ray Flare of π UMA : Temperature and Emission Measure

1989 ◽  
Vol 104 (2) ◽  
pp. 127-130
Author(s):  
M. Landini ◽  
B.C. Monsignori Fossi
Keyword(s):  
Temperature Gradient ◽  
Power Supply ◽  
Emission Measure ◽  
Low Energy ◽  
Loop Model ◽  
Medium Energy ◽  
Differential Emission Measure ◽  
X Ray ◽  
Spectral Bands

AbstractAn X-ray flare from the star π UMA has been observed by EXOSAT on January 31, 1984. The data were collected using the-Low Energy Experiment and the Medium Energy Experiment, sensitive to the spectral bands 0.04 - 2 Kev and 1-20 Kev (Landini et al. 1986).The temperature and emission measure variations during the flare are deduced under the isothermal assumption. Using a parametrized profile of the differential emission measure, wich is controlled by the conductive flux via the temperature gradient, the comparison with the observed data gives some insight on a “mean loop” model and its power supply.

Determination of differential emission measure from X-ray solar spectra registered by RESIK aboard CORONAS-F

2006 ◽  
Vol 40 (4) ◽  
pp. 294-301 ◽  
Author(s):  
A. Kepa ◽  
J. Sylwester ◽  
B. Sylwester ◽  
M. Siarkowski ◽  
A. I. Stepanov
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure ◽  
X Ray

scholarly journals Differential emission measure analysis of hot-flare plasma from solar-maximum mission X-ray data

1984 ◽  
Vol 4 (7) ◽  
pp. 203-207 ◽  
Author(s):  
J. Jakimiec ◽  
J. Sylwester ◽  
J.R. Lemen ◽  
R. Mewe ◽  
R.D. Bentley ◽  
...  
Keyword(s):  
Solar Maximum ◽  
Emission Measure ◽  
Differential Emission Measure ◽  
Solar Maximum Mission ◽  
X Ray ◽  
Measure Analysis ◽  
Flare Plasma

Regularized Reconstruction of the Differential Emission Measure from Solar Flare Hard X-Ray Spectra

Solar Physics ◽  
2006 ◽  
Vol 237 (1) ◽  
pp. 61-83 ◽  
Author(s):  
M. Prato ◽  
M. Piana ◽  
J. C. Brown ◽  
A. G. Emslie ◽  
E. P. Kontar ◽  
...  
Keyword(s):  
Solar Flare ◽  
Emission Measure ◽  
Differential Emission Measure ◽  
X Ray

scholarly journals Abundances of Potassium, Argon, and Sulphur in Solar Flares

2004 ◽  
Vol 219 ◽  
pp. 176-180
Author(s):  
K. J. H. Phillips ◽  
J. Sylwester ◽  
B. Sylwester ◽  
E. Landi
Keyword(s):  
Ionization Potential ◽  
Continuous Spectrum ◽  
Solar Flares ◽  
Emission Measure ◽  
Differential Emission Measure ◽  
Crystal Spectrometer ◽  
Isothermal Model ◽  
X Ray ◽  
Long Duration ◽  
First Ionization Potential

Observations of the 3.3—6.1 Â X-ray line and continuous spectrum during four long-duration flares with the RESIK crystal spectrometer on the Coronas-F spacecraft have been analyzed to get the absolute abundances of potassium, argon, and sulphur. A differential emission measure of the form DEM ∝ exp(—Te/T0) was found to give the most consistent results of three models including an isothermal model. We obtained K/H = (3.7 ± 1.0) x 10—7, a factor 3 times photospheric; Ar/H = (2.8 ± 0.2) x 10—6, slightly lower than photospheric; and S/H = (2.2±0.4) x 10—5, approximately equal to photospheric. These measurements are consistent with a pattern in which elements with low (< 10 eV) first ionization potential are enriched in the corona by a factor of about 3 and elements of high first ionization potential have abundances approximately equal to photospheric.

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