Results 11 to 20 of about 2,918,449 (280)

Extreme ultraviolet emission lines of Ni XII in laboratory and solar spectra [PDF]

open access: bronzeMonthly Notices of the Royal Astronomical Society, 2000
Wavelengths for emission lines arising from 3s23p5-3s3p6 and 3s23p5-3s23p43d transitions in Ni XII have been measured in extreme ultraviolet spectra of the Joint European Torus(JET) tokamak. The 3s23p5 2P1/2-3s23p4(3P)3d 2D3/2 line is found to lie at 152.
Gert Botha, K D Lawson, F P Keenan
exaly   +4 more sources

Evidence of Extreme-ultraviolet Resonant Excitation in the Middle Corona during a Solar Flare [PDF]

open access: yesThe Astrophysical Journal
We present observations of an eruptive solar flare on 2016 January 6 that occurred behind the solar limb from the perspective of the Earth, but was well observed by the Solar-Terrestrial Relations Observatory (or STEREO) and the Solar Extreme Ultraviolet
Daniel B. Seaton   +12 more
doaj   +4 more sources

An investigation of Fe XVI emission lines in solar and stellar extreme-ultraviolet and soft X-ray spectra [PDF]

open access: bronze, 2007
New fully relativistic calculations of radiative rates and electron impact excitation cross-sections for Fe XVI are used to determine theoretical emission-line ratios applicable to the 251-361 and 32-77 angstrom portions of the extreme-ultraviolet (EUV ...
Francis P. Keenan   +2 more
openalex   +3 more sources

Emission lines of Fe x in active region spectra obtained with the Solar Extreme-ultraviolet Research Telescope and Spectrograph [PDF]

open access: bronze, 2008
Fully relativistic calculations of radiative rates and electron impact excitation cross-sections for Fe X are used to derive theoretical emission-line ratios involving transitions in the 174-366 angstrom wavelength range. A comparison of these with solar
Francis P. Keenan   +5 more
openalex   +3 more sources

Signature of Saturn's auroral cusp : simultaneous Hubble Space Telescope FUV observations and upstream solar wind monitoring [PDF]

open access: yes, 2005
Model simulations by Bunce et al. (2005a) have shown that direct precipitation of electrons in Saturn's dayside cusp regions is not capable of producing significant FUV aurora.
Cowley, Stanley W. H.   +5 more
core   +6 more sources

Radiation Pressure Acting on the Neutral He Atoms in the Heliosphere

open access: yesThe Astrophysical Journal, 2023
Interstellar neutral helium (ISN He) is an important source of information on the physical state of the local interstellar medium. Radiation pressure acting on the neutral helium atoms in the heliosphere has always been neglected; its effect has been ...
I. Kowalska-Leszczynska   +2 more
doaj   +1 more source

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