The l(1)S-n(1)P/1(1)S-2(1)P emission-line ratios in O VII as temperature diagnostics for solar flares and active regions

1985 ◽  
Vol 291 ◽  
pp. 855 ◽  
Author(s):  
F. P. Keenan ◽  
A. E. Kingston ◽  
D. L. McKenzie
Keyword(s):  
Emission Line ◽  
Solar Flares ◽  
Active Regions ◽  
Temperature Diagnostics

The 1 1S-n 1 P/1 1S-2 1 P emission-line ratios in SI XIII as electron temperature diagnostics for solar flares and active regions

1990 ◽  
Vol 363 ◽  
pp. 310 ◽  
Author(s):  
F. P. Keenan ◽  
S. M. McCann ◽  
K. J. H. Phillips
Keyword(s):  
Emission Line ◽  
Electron Temperature ◽  
Solar Flares ◽  
Active Regions ◽  
Temperature Diagnostics

X-ray emission-line ratios in MG XI as electron temperature diagnostics for solar flares and active regions

1992 ◽  
Vol 393 ◽  
pp. 815 ◽  
Author(s):  
F. P. Keenan ◽  
K. J. H. Phillips ◽  
L. K. Harra ◽  
E. S. Conlon ◽  
A. E. Kingston
Keyword(s):  
Emission Line ◽  
Electron Temperature ◽  
Solar Flares ◽  
Active Regions ◽  
X Ray ◽  
Temperature Diagnostics

Evidence for a Cutoff in the Frequency Distribution of Solar Flares from Small Active Regions

1997 ◽  
Vol 475 (1) ◽  
pp. 338-347 ◽  
Author(s):  
T. A. Kucera ◽  
B. R. Dennis ◽  
R. A. Schwartz ◽  
D. Shaw
Keyword(s):  
Frequency Distribution ◽  
Solar Flares ◽  
Active Regions

Peculiarities of the microwave emission from active regions generating intense solar flares

2003 ◽  
Vol 29 (4) ◽  
pp. 263-273 ◽  
Author(s):  
V. M. Bogod ◽  
S. Kh. Tokhchukova
Keyword(s):  
Solar Flares ◽  
Active Regions ◽  
Microwave Emission

A Study of Connections Between Solar Flares and Subsurface Flow Fields of Active Regions

2013 ◽  
pp. 57-66
Author(s):  
Yu Gao ◽  
Junwei Zhao ◽  
Hongqi Zhang
Keyword(s):  
Solar Flares ◽  
Subsurface Flow ◽  
Active Regions ◽  
Flow Fields

scholarly journals Updated calculations of the ionization equilibrium for the non-Maxwellian electron n-distributions in solar flares

2015 ◽  
Vol 11 (S320) ◽  
pp. 243-245
Author(s):  
Elena Dzifčáková ◽  
Jaroslav Dudík
Keyword(s):  
Solar Flares ◽  
Maxwellian Distribution ◽  
Atomic Data ◽  
Ionization Equilibrium ◽  
Proton Number ◽  
Abundance Peak ◽  
Temperature Diagnostics

AbstractThe assumption of an equilibrium (Maxwellian) distribution of electron energies cannot explain observed high intensities of the Si XIId satellite lines relative to the Si XIII allowed lines during the flares. However, the presence of n-distribution with a higher and narrower shape than the Maxwellian one is able to explain this behavior. We calculated the ionization equilibrium for the non-thermal n-distributions using the latest atomic data for each element up to the proton number of 30. Significant changes in the shape and maxima of the ion abundance peak occur and can strongly influence the temperature diagnostics.

OPTICAL SYSTEM DESIGN OF THE DETECTOR FOR SOLAR TERAHERTZ EMISSION MEASUREMENTS

2021 ◽  
pp. 22-30
Author(s):  
Aleksandr A. KVASHNIN ◽  
Valery I. LOGACHEV ◽  
Maksim V. PHILIPPOV ◽  
Vladimir S. MAKHMUTOV ◽  
Osman MAKSUMOV ◽  
...  
Keyword(s):  
System Design ◽  
Optical System ◽  
Solar Flares ◽  
Electromagnetic Emission ◽  
Active Regions ◽  
Close Correlation ◽  
Frequency Range ◽  
Terahertz Emission ◽  
Optical System Design ◽  
Astrophysical Objects

The objectives and scientific tasks of the planned space experiment “Solntse-Terahertz” to be performed onboard the ISS Russian Segment are briefly described in the paper. In particular, the aim of the experiment is to study uninvestigated solar electromagnetic emission in the terahertz domain, in ~ 1012 – 1013 Hz (300-30 µm) frequency range. It is expected to obtain new data on solar active region emission including solar flare emission. These data are necessary to clarify the nature of solar activity and construct physical model of charged particle acceleration in active regions during solar flares and other astrophysical objects. We focus on the telescope optical system design and evaluation of main characteristics of this system. Results of simulations and comparison with the experimental verification of obtained characteristics are presented. A close correlation of the estimations and experimental results was obtained. As a result, main parameters of the telescope optical system of experimental hardware “Solntse-Terahertz” were determined. Key words: Sun, solar flares, terahertz emission, optical system.

Study of the 28 October 2003 and 20 January 2005 solar flares by means of 2.223MeV gamma-emission line

2009 ◽  
Vol 43 (4) ◽  
pp. 547-552 ◽  
Author(s):  
Evgenia V. Troitskaia ◽  
Irene V. Arkhangelskaja ◽  
Leonty I. Miroshnichenko ◽  
Andrey I. Arkhangelsky
Keyword(s):  
Emission Line ◽  
Solar Flares ◽  
Gamma Emission
Sign in / Sign up

Export Citation Format

Share Document