Results 31 to 40 of about 1,700,755 (212)

Transient ionization and solar flare X-ray spectra

The Astrophysical Journal, 1987
In this paper the effects of a transiently ionizing solar flare plasma on the X-ray spectrum of iron between 1.85 and 1.92 A are considered. The atomic physics of the nonequilibrium spectrum is discussed, and reasons for differences in appearance from ionization equilibrium spectra are explained.
G. A. Doschek, K. Tanaka
openaire   +1 more source

THE SOLAR FLARE CHLORINE ABUNDANCE FROM RESIK X-RAY SPECTRA [PDF]

The Astrophysical Journal, 2011
13 pages, 3 colour figures.
Sylwester, B., Phillips, K. J. H., Sylwester, J., Kuznetsov, V. D.   +3 more
openaire   +2 more sources

Tracking X-Ray Source Movement in a Retracting Flux Tube

The Astrophysical Journal, 2023
Solar flares produce sources of localized, enhanced X-ray emission, thought to be due to the acceleration of nonthermal electrons and the transport of energy away from the reconnection site.
John Unverferth, Jeffrey W. Reep
doaj   +1 more source

Energy Deposition into the Ionosphere during a Solar Flare with Extreme-ultraviolet Late Phase

The Astrophysical Journal Letters
Solar extreme-ultraviolet (EUV) irradiance is the dominant energy source for ionizing and heating the Earth’s upper atmosphere. It is common to assume that the spectra of different EUV lines have the same trend to fill the solar EUV irradiance gap for ...
Jing Liu, Liying Qian, Wenbin Wang, Kevin Pham, Xiangliang Kong, Yao Chen, Wenlong Liu, Libo Liu, Xuanqing Liu   +8 more
doaj   +1 more source

Low-Energy Cutoffs in Electron Spectra of Solar Flares: Statistical Survey [PDF]

Solar Physics, 2008
9 pages, 5 figures, submitted to Solar ...
Kontar, E. P., Dickson, E., Kasparova, J.   +2 more
openaire   +2 more sources

Machine Learning Interatomic Potentials for Energy Materials: Architectures, Training Strategies, and Applications

Advanced Energy Materials, EarlyView.
Machine learning interatomic potentials bridge quantum accuracy and computational efficiency for materials discovery. Architectures from Gaussian process regression to equivariant graph neural networks, training strategies including active learning and foundation models, and applications in solid‐state electrolytes, batteries, electrocatalysts ...
In Kee Park, Saeed Pourasad, Jinhong Mun, Arunkumar Chitteth Rajan, Tae Hyeon Park, Anand Rohit, Mohammad Zafari, Tan‐Lien Pham, Eunjae Jung, Bonseung Koo, Miran Ha, Gi Beom Sim, Hyun Gyu Park, Won Woong Choi, Kwanghyeon Jo, Soohaeng Yoo Willow, David ChangMo Yang, Chang Woo Myung, Geunsik Lee, Kwang S. Kim   +19 more
wiley   +1 more source

X-Ray Spectroscopy via Temporal Decomposition

The Astrophysical Journal
We present a novel way to fit solar flare X-ray spectra that offers more sensitivity to physical flare parameters than traditional approaches to spectroscopy for certain types of flares. We decouple physically distinct emission types in solar flare X-ray
William Setterberg, Lindsay Glesener
doaj   +1 more source

HIGH DIELECTRONIC SATELLITE LINES IN SOLAR FLARE SPECTRA

Le Journal de Physique Colloques, 1979
Resonance lines of highly ionized H and He-like ions and their associated satellite lines are used to determine the electron temperature and the transient state of the plasma in solar flares. The intensity ratio of the satellite lines 1s2nl-1s2pnl to the resonance line 1s2-1s2p has been calculated for the n = 2, 3 and 4 shells of Fe XXIV.
Steenman-Clark, L., Bely Dubau, F., Dubau, J., Faucher, P., Gabriel, Aurélie, Loulergue, M., Volonté, S.   +6 more
openaire   +1 more source

Sequential Reduction of Chromite Pellets Using Hydrogen and Silicon Carbide for Carbon Emission Abatement During Ferrochrome Production

steel research international, EarlyView.
H2 prereduction selectively metallizes Fe in UG2 chromite pellets at 1100°C, while silicon carbide becomes active at 1300°C to convert remaining Cr2O3 to carbides and promote Cr metallization. By separating the roles of H2 and SiC, the sequential route reaches up to 65.7% Cr metallization and suppresses in‐furnace CO generation by ≈75% versus ...
D. Coertzen, M. Tangstad, J. P. Beukes, P. G. van Zyl, D. G. Bessarabov, S. P. du Preez   +5 more
wiley   +1 more source

Topics in Energy Release and Particle Acceleration in the Heliosphere [PDF]

, 2014
This thesis investigates both the release of energy in solar flares, and the acceleration and transport of particles in various astrophysical situations.
Armstrong, Craig Keith
core