Models of the Solar Chromosphere and Transition Region from SUMER and HRTS Observations: Formation of the Extreme‐Ultraviolet Spectrum of Hydrogen, Carbon, and Oxygen

2008 ◽  
Vol 175 (1) ◽  
pp. 229-276 ◽  
Author(s):  
Eugene H. Avrett ◽  
Rudolf Loeser
Keyword(s):  
Transition Region ◽  
Extreme Ultraviolet ◽  
Ultraviolet Spectrum ◽  
Solar Chromosphere

scholarly journals Experiment to Determine the Temperature Structure in the Solar Chromosphere and Corona

1972 ◽  
Vol 14 ◽  
pp. 668-669
Author(s):  
C. R. Negus
Keyword(s):  
Transition Region ◽  
Extreme Ultraviolet ◽  
Normal Incidence ◽  
Research Unit ◽  
Emission Lines ◽  
Solar Chromosphere ◽  
Temperature Structure ◽  
Ultraviolet Emission ◽  
Ionization Temperature ◽  
Intensity Ratios

An experiment is in course of preparation at the Astrophysics Research Unit at Culham for flight on a Sun-pointing rocket. It is designed to determine the ionization temperature and electron density as a function of height in the temperature range of about 8 × 104 K to 3 × 106 K by measuring limb to disk intensity ratios of extreme ultraviolet emission lines in the 170 to 850 Å region. The work is an extension of current experiments in which normal-incidence spectrographs are used to determine the structure lower in the chromosphere-corona transition region.

Extreme-Ultraviolet Spectrum of N iv*

1971 ◽  
Vol 61 (5) ◽  
pp. 625 ◽  
Author(s):  
D. J. Michels ◽  
S. G. Tileord ◽  
J. W. Quinn
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Spectrum

scholarly journals Hot prominence spicules launched from turbulent cool solar prominences

2019 ◽  
Vol 627 ◽  
pp. L5 ◽  
Author(s):  
L. P. Chitta ◽  
H. Peter ◽  
L. Li
Keyword(s):  
Transition Region ◽  
Extreme Ultraviolet ◽  
The Sun ◽  
Solar Dynamics Observatory ◽  
Solar Prominences ◽  
Solar Filament ◽  
Solar Dynamics ◽  
Ultraviolet Observations ◽  
Hot Corona ◽  
Shed Light

A solar filament is a dense cool condensation that is supported and thermally insulated by magnetic fields in the rarefied hot corona. Its evolution and stability, leading to either an eruption or disappearance, depend on its coupling with the surrounding hot corona through a thin transition region, where the temperature steeply rises. However, the heating and dynamics of this transition region remain elusive. We report extreme-ultraviolet observations of quiescent filaments from the Solar Dynamics Observatory that reveal prominence spicules propagating through the transition region of the filament-corona system. These thin needle-like jet features are generated and heated to at least 0.7 MK by turbulent motions of the material in the filament. We suggest that the prominence spicules continuously channel the heated mass into the corona and aid in the filament evaporation and decay. Our results shed light on the turbulence-driven heating in magnetized condensations that are commonly observed on the Sun and in the interstellar medium.

Expected extreme ultraviolet spectrum of the lunar surface

1991 ◽  
Vol 18 (11) ◽  
pp. 2161-2164 ◽  
Author(s):  
Bradley C. Edwards ◽  
William C. Priedhorsky ◽  
Barham W. Smith
Keyword(s):  
Lunar Surface ◽  
Extreme Ultraviolet ◽  
Ultraviolet Spectrum

THE EXTREME ULTRAVIOLET SPECTRUM OF HIGHLY CHARGED COPPER IONS

2016 ◽  
Vol 152 (5) ◽  
pp. 135 ◽  
Author(s):  
Z. H. Yang ◽  
S. B. Du ◽  
M. G. Su ◽  
H. W. Chang ◽  
Y. P. Guo
Keyword(s):  
Extreme Ultraviolet ◽  
Copper Ions ◽  
Ultraviolet Spectrum

The Extreme-Ultraviolet Spectrum of fe XV in a Solar Flare

1973 ◽  
Vol 180 ◽  
pp. 285 ◽  
Author(s):  
Robert D. Cowan ◽  
Kenneth G. Widing
Keyword(s):  
Solar Flare ◽  
Extreme Ultraviolet ◽  
Ultraviolet Spectrum
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