Results 21 to 30 of about 155,544 (195)

Impulsive Hard X-Ray and Ultraviolet Emission during Solar Flares

The Astrophysical Journal, 1971
S. R. Kane, R. F. Donnelly
openaire   +2 more sources

CHIANTI—An Atomic Database for Emission Lines. XVII. Version 10.1: Revised Ionization and Recombination Rates and Other Updates

The Astrophysical Journal Supplement Series, 2023
The CHIANTI atomic database provides sets of assessed data that are used for simulating spectral observations of astrophysical plasmas. This article describes updates that will be released as version 10.1 of the database.
Kenneth P. Dere, G. Del Zanna, P. R. Young, E. Landi   +3 more
doaj   +1 more source

Further Measurements of Emission Line Profiles in the Solar Ultraviolet Spectrum [PDF]

Monthly Notices of the Royal Astronomical Society, 1975
B. C. Boland, E. P. Dyer, J. G. Firth, A. H. Gabriel, B. B. Jones, C. Jordan, R. W. P. McWhirter, P. Monk, R. F. Turner   +8 more
openaire   +2 more sources

Ultraviolet Emission Lines in the Solar Spectrum.

The Astrophysical Journal, 1958
W. E. Behring, H. McAllister, W. A. Rense   +2 more
openaire   +2 more sources

Solar control of \begin{document}${\text{CO}}_{\text{2}}^{\text{+}}$\end{document} ultraviolet doublet emission on Mars

Earth and Planetary Physics, 2020
The \begin{document}$ {\rm{CO}}_2^+$\end{document} ultraviolet doublet (UVD) emission near 289 nm is an important feature of dayside airglow emission from planetary upper atmospheres. In this study, we analyzed the brightness profiles of \begin{document}$
ZiChuan Li, Jun Cui, Jing Li, XiaoShu Wu, JiaHao Zhong, FaYu Jiang   +5 more
doaj   +1 more source

Statistical analysis for EUV dynamic spectra and their impact on the ionosphere during solar flares

Earth, Planets and Space, 2023
The X-rays and extreme ultraviolet (EUV) emitted during solar flares can rapidly change the physical composition of Earth’s ionosphere, causing space weather phenomena.
Shohei Nishimoto, Kyoko Watanabe, Hidekatsu Jin, Toshiki Kawai, Shinsuke Imada, Tomoko Kawate, Yuichi Otsuka, Atsuki Shinbori, Takuya Tsugawa, Michi Nishioka   +9 more
doaj   +1 more source

Radiation Pressure Acting on the Neutral He Atoms in the Heliosphere

The 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, M. A. Kubiak, M. Bzowski   +2 more
doaj   +1 more source

Solar Ultraviolet Bursts [PDF]

Space Science Reviews, 2018
The term “ultraviolet (UV) burst” is introduced to describe small, intense, transient brightenings in ultraviolet images of solar active regions. We inventorize their properties and provide a definition based on image sequences in transition-region lines.
P. Young, H. Tian, H. Peter, R. Rutten, C. Nelson, Zhenghua Huang, B. Schmieder, G. Vissers, S. Toriumi, Luc H. M. Rouppe van der Voort, M. Madjarska, S. Danilovic, A. Berlicki, L. P. Chitta, M. Cheung, C. Madsen, K. Reardon, Y. Katsukawa, P. Heinzel   +18 more
semanticscholar   +1 more source

The Role of Magnetic Shear in Reconnection-driven Flare Energy Release

The Astrophysical Journal, 2023
Using observations from the Solar Dynamics Observatory’s Atmosphere Imaging Assembly and the Ramaty High Energy Solar Spectroscopic Imager, we present novel measurements of the shear of post-reconnection flare loops (PRFLs) in SOL20141218T21:40 and study
J. Qiu, M. Alaoui, S. K. Antiochos, J. T. Dahlin, M. Swisdak, J. F. Drake, A. Robison, C. R. DeVore, V. M. Uritsky   +8 more
doaj   +1 more source

INTENSITY ENHANCEMENT OF O vi ULTRAVIOLET EMISSION LINES IN SOLAR SPECTRA DUE TO OPACITY [PDF]

, 2014
Opacity is a property of many plasmas. It is normally expected that if an emission line in a plasma becomes optically thick, then its intensity ratio to that of another transition that remains optically thin should decrease.
F. Keenan, J. G. Doyle, M. Madjarska, S. Rose, L. A. Bowler, L. A. Bowler, J. Britton, Lisa McCrink, M. Mathioudakis   +8 more
semanticscholar   +1 more source