Comparison of the Sacramento Peak FexivIndex with a Model Index Computed from Differential Emission Measure Maps

2005 ◽  
Vol 633 (1) ◽  
pp. 518-527 ◽  
Author(s):  
J. W. Cook ◽  
J. S. Newmark ◽  
R. C. Altrock
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure ◽  
Sacramento Peak

scholarly journals ON THE ACCURACY OF THE DIFFERENTIAL EMISSION MEASURE DIAGNOSTICS OF SOLAR PLASMAS. APPLICATION TO SDO /AIA. II. MULTITHERMAL PLASMAS

2012 ◽  
Vol 203 (2) ◽  
pp. 26 ◽  
Author(s):  
C. Guennou ◽  
F. Auchère ◽  
E. Soubrié ◽  
K. Bocchialini ◽  
S. Parenti ◽  
...  
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure ◽  
Solar Plasmas

Analysis of the differential emission measure distributions for solar flares observed by RESIK

2018 ◽  
Vol 179 ◽  
pp. 545-552
Author(s):  
A. Kepa ◽  
B. Sylwester ◽  
J. Sylwester ◽  
M. Gryciuk ◽  
M. Siarkowski
Keyword(s):  
Solar Flares ◽  
Emission Measure ◽  
Differential Emission Measure

Kinematics and Differential Emission Measure of the Flux Rope during Coronal Mass Ejections

2012 ◽  
Vol 55 ◽  
pp. 287-291
Author(s):  
M.D. Ding ◽  
X. Cheng ◽  
J. Zhang
Keyword(s):  
Coronal Mass Ejections ◽  
Emission Measure ◽  
Flux Rope ◽  
Differential Emission Measure

scholarly journals Energetics of Hi-C EUV brightenings

2018 ◽  
Vol 615 ◽  
pp. A47 ◽  
Author(s):  
Srividya Subramanian ◽  
Vinay L. Kashyap ◽  
Durgesh Tripathi ◽  
Maria S. Madjarska ◽  
John G. Doyle
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Extreme Ultraviolet ◽  
Thermal Structure ◽  
Emission Measure ◽  
Light Curves ◽  
Solar Dynamics Observatory ◽  
Differential Emission Measure ◽  
Dominant Mechanism ◽  
Solar Dynamics

We study the thermal structure and energetics of the point-like extreme ultraviolet (EUV) brightenings within a system of fan loops observed in the active region AR 11520. These brightenings were simultaneously observed on 2012 July 11 by the High-resolution Coronal (Hi-C) imager and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). We identified 27 brightenings by automatically determining intensity enhancements in both Hi-C and AIA 193 Å light curves. The energetics of these brightenings were studied using the Differential Emission Measure (DEM) diagnostics. The DEM weighted temperatures of these transients are in the range log T(K) = 6.2−6.6 with radiative energies ≈1024−25 ergs and densities approximately equal to a few times 109 cm−3. To the best of our knowledge, these are the smallest brightenings in EUV ever detected. We used these results to determine the mechanism of energy loss in these brightenings. Our analysis reveals that the dominant mechanism of energy loss for all the identified brightenings is conduction rather than radiation.

scholarly journals The Slowly Varying Corona. I. Daily Differential Emission Measure Distributions Derived from EVE Spectra

2017 ◽  
Vol 844 (2) ◽  
pp. 163 ◽  
Author(s):  
S. J. Schonfeld ◽  
S. M. White ◽  
R. A. Hock-Mysliwiec ◽  
R. T. J. McAteer
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure

scholarly journals Spectroscopy and Differential Emission Measure Diagnostics of a Coronal Dimming Associated with a Fast Halo CME

2019 ◽  
Vol 879 (2) ◽  
pp. 85 ◽  
Author(s):  
Astrid M. Veronig ◽  
Peter Gömöry ◽  
Karin Dissauer ◽  
Manuela Temmer ◽  
Kamalam Vanninathan
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure ◽  
Coronal Dimming

scholarly journals DEM Analyses with the Utrecht Codes

1996 ◽  
Vol 152 ◽  
pp. 553-560
Author(s):  
R. Mewe ◽  
G.H.J. van den Oord ◽  
C.J. Schrijver ◽  
J.S. Kaastra
Keyword(s):  
Emission Measure ◽  
Resonant Scattering ◽  
Continuum Emission ◽  
Second Derivative ◽  
Inversion Problem ◽  
Differential Emission Measure ◽  
The Past ◽  
Cool Stars ◽  
Ill Posed ◽  
Thin Plasma

We address the inversion problem of deriving the differential emission measure (DEM) distribution D(T) = nenHdV/d log T from the spectrum of an optically thin plasma. In the past we have applied the iterative Withbroe-Sylwester technique and the Polynomial technique to the analysis of EXOSAT spectra of cool stars, but recently we have applied the inversion technique discussed by Craig & Brown (1986) and Press et al. (1992) in the analysis of EUVE spectra of cool stars. The inversion problem-a Fredholm equation of the first kind-is ill-posed and solutions tend to show large, unphysical oscillations. We therefore apply a second-order regularization, i.e., we select the specific DEM for which the second derivative is as smooth as is statistically allowed by the data. We demonstrate the importance of fitting lines and continuum simultaneously, discuss the effect on the DEM of continuum emission at temperatures where no line diagnostics are available, and address possible ways to check various model assumptions such as abundances and photon destruction induced by resonant scattering.

scholarly journals DIFFERENTIAL EMISSION MEASURE ANALYSIS OF A LIMB SOLAR FLARE ON 2012 JULY 19

2014 ◽  
Vol 786 (1) ◽  
pp. 73 ◽  
Author(s):  
J. Q. Sun ◽  
X. Cheng ◽  
M. D. Ding
Keyword(s):  
Solar Flare ◽  
Emission Measure ◽  
Differential Emission Measure ◽  
Measure Analysis

scholarly journals The WHI Corona from Differential Emission Measure Tomography

Solar Physics ◽  
2011 ◽  
Vol 274 (1-2) ◽  
pp. 259-284 ◽  
Author(s):  
Alberto M. Vásquez ◽  
Zhenguang Huang ◽  
Ward B. Manchester ◽  
Richard A. Frazin
Keyword(s):  
Emission Measure ◽  
Differential Emission Measure
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