Results 1 to 10 of about 2,341 (148)
Validation of Computed Extreme Ultraviolet Emission Spectra During Solar Flares [PDF]
Earth, Planets and Space, 2020 Abstract X-rays and extreme ultraviolet (EUV) emissions from solar flares rapidly change the physical composition of the Earth’s thermosphere and ionosphere, thereby causing space weather phenomena such as communication failures. To predict the effects of flare emissions on the Earth’s upper atmosphere, numerous empirical and physical models ...
Shohei Nishimoto +4 more
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Proxy-based Prediction of Solar Extreme Ultraviolet Emission Using Deep Learning [PDF]
The Astrophysical Journal Letters, 2021 Abstract High-energy radiation from the Sun governs the behavior of Earth’s upper atmosphere and such radiation from any planet-hosting star can drive the long-term evolution of a planetary atmosphere. However, much of this radiation is unobservable because of absorption by Earth’s atmosphere and the interstellar medium.
Anthony Pineci +3 more
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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 +2 more
doaj +1 more source
Determination of Differential Emission Measure from Solar Extreme Ultraviolet Images [PDF]
The Astrophysical Journal Letters, 2018 Abstract The Atmospheric Imaging Assembly (AIA) on board the Solar Dynamic Observatory (SDO) has been providing high-cadence, high-resolution, full-disk UV-visible/extreme ultraviolet (EUV) images since 2010, with the best time coverage among all the solar missions.
Yang Su +7 more
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A Model for Gradual-phase Heating Driven by MHD Turbulence in Solar Flares
The Astrophysical Journal, 2023 Coronal flare emission is commonly observed to decay on timescales longer than those predicted by impulsively driven, one-dimensional flare loop models.
William Ashfield IV, Dana Longcope
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Explosive events in the solar atmosphere seen in extreme-ultraviolet emission lines [PDF]
Astronomy & Astrophysics, 2005 We present observations of explosive events (EEs) in the solar atmosphere obtained with the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer on the Solar and Heliospheric Observatory (SOHO) in the wavelength range from about 750 A to 790 A.
Mendoza-Torres, J. +2 more
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Extreme ultraviolet emission lines of Ni XII in laboratory and solar spectra [PDF]
Monthly 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 152.90 ± 0.02 A, a significant improvement over the previous experimental determination of 152.95 ± 0.5
Keenan, Francis +4 more
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Extreme-ultraviolet and X-Ray Emission of Turbulent Solar Flare Loops [PDF]
The Astrophysical Journal Letters, 2019 Abstract Turbulence has been observed in flare loops and is believed to be crucial for the acceleration of particles and in the emission of X-ray photons in flares, but how the turbulence is produced is still an open question. A scenario proposed by Fang et al.
Ruan, Wenzhi, Xia, Chun, Keppens, Rony
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The Astrophysical Journal, 2022 Abstract The hydrogen Lyα (H i Lyα) emission during solar flares has rarely been studied in spatially resolved images, and its physical origin has not been fully understood. In this paper, we present novel Lyα images for a C1.4 solar flare (SOL2021-08-20T22:00) from the Extreme Ultraviolet Imager aboard Solar Orbiter, together with multi-
Y. Li +9 more
openaire +5 more sources
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 +9 more
doaj +1 more source