Results 1 to 10 of about 19,901 (149)

Correlation of the Flux of Energetic Rays and Particles with the Solar Cycle [PDF]

Iranian Journal of Astronomy and Astrophysics, 2022
A solar flare is a sudden flash that occurs near the solar surface. Thisresults in the emission of an extensive range of energy from the surface of the Sun.These giant explosions generally contain X-rays and energy that tend to travel in alldirections at
Ehsan Tavabi, Sima Zeighami, Ali Aleali
doaj   +1 more source

Advances in soft X-ray emission of the Earth's magnetosphere

地球与行星物理论评, 2023
The coupling between solar wind and the magnetosphere and the dynamic processes in geo-space are the basic driving factors of space weather. Understanding these processes on the system level is essential to the studies of space physics and space weather.
Tianran Sun, Yingjie Zhang, Fei Wei, Songwu Peng, Zhonghua Yao, Chi Wang   +5 more
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Detectability of Sungrazing Comet Soft X-ray Irradiance [PDF]

Journal of Astronomy and Space Sciences, 2007
Originating from the Oort cloud, some comets disappear to impact against the Sun or to split up by strong gravitational force. Then they don't go back to the Oort cloud. They are called sungrazing comets.
Su Yeon Oh, Yu Yi, Jakyoung Nah, Yong Ha Kim   +3 more
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Relationship Between Solar Millimeter and Soft X-Ray Emissions

Latvian Journal of Physics and Technical Sciences, 2022
Abstract The connection between solar radio and soft X-ray emission has earlier been studied at various radio frequencies. For instance, the intensity peak times during solar flares have been compared between these two wavelength regimes.
Tornikoski Merja, Kallunki Juha
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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

Investigations of Flaring Plasma Parameters during an M-class Flare Using the Differential Evolution Method and XSM/Chandrayaan-2 Observations

The Astrophysical Journal Letters, 2023
We employ the differential evolution (DE) method to analyze observations from the Solar X-Ray Monitor on board the Chandrayaan-2 spacecraft. DE belongs to the family of evolutionary algorithms that find solutions using mechanisms inspired by biological ...
Anna Kępa, Marek Siarkowski, Arun Kumar Awasthi, Janusz Sylwester, Barbara Sylwester   +4 more
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X-ray emission from the solar wind [PDF]

Symposium - International Astronomical Union, 1970
Recent developments have made it possible to detect cosmic X-rays with energies as low as several hundred eV. Several measurements of the diffuse X-radiation in this range have been reported (Baxter et al., 1969; Bowyer et al., 1968; Henry et al., 1968).
E. Boldt, A. Klimas, G. Sandri
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Jupiter's X‐ray Emission During the 2007 Solar Minimum [PDF]

Journal of Geophysical Research: Space Physics, 2020
AbstractThe 2007–2009 solar minimum was the longest of the space age. We present the first of two companion papers on Chandra and XMM‐Newton X‐ray campaigns of Jupiter through February–March 2007. We find that low solar X‐ray flux during solar minimum causes Jupiter's equatorial regions to be exceptionally X‐ray dim (0.21 GW at minimum; 0.76 GW at ...
W. R. Dunn, G. Branduardi‐Raymont, V. Carter‐Cortez, A. Campbell, R. Elsner, J.‐U. Ness, G. R. Gladstone, P. Ford, Z. Yao, P. Rodriguez, G. Clark, C. Paranicas, A. Foster, D. Baker, R. Gray, S. V. Badman, L. C. Ray, E. J. Bunce, B. Snios, C. M. Jackman, I. J. Rae, R. Kraft, A. Rymer, S. Lathia, N. Achilleos   +24 more
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LOW-POWER SOLAR FLARES OF OPTICAL AND X-RAY WAVELENGTHS FOR SOLAR CYCLES 21–24

Solar-Terrestrial Physics, 2020
Using data obtained in optical and X-ray wavelengths, we have analyzed solar flare activity for cycles 21–24. Over the last three cycles, solar activity is shown to decrease significantly.
A.V. Borovik , A.A. Zhdanov
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Modeling Hadronic Gamma-Ray Emissions from Solar Flares and Prospects for Detecting Nonthermal Signatures from Protostars

The Astrophysical Journal, 2023
We investigate gamma-ray emission in the impulsive phase of solar flares and the detectability of nonthermal signatures from protostellar flares. Energetic solar flares emit high-energy gamma rays of GeV energies, but their production mechanism and ...
Shigeo S. Kimura, Shinsuke Takasao, Kengo Tomida   +2 more
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