Results 111 to 120 of about 18,154 (212)
Improving Solar Flare Nowcasting with the Hot Onset Precursor Event Technique
The Astrophysical JournalThis study investigates the statistical behavior of plasma properties during hot onset precursor events (HOPEs) of solar flares and evaluates their potential for improving flare nowcasting.
Anant Telikicherla +2 more
doaj +1 more source
The Astrophysical JournalI report on the high-resolution spectra of the remarkable X9 solar flare of 2024 October 3 (SOL2024-10-03T12:08) and evaluate the extent to which nonthermal electron beams that generate dense chromospheric condensations can power very bright kernels in ...
Adam F. Kowalski
doaj +1 more source
Lunar surface cosmic ray experiment [PDF]
The galactic cosmic ray and solar flare experiment on Apollo 16 is reported. The published papers presented describe the experiment, equipment, data processing techniques, and operational history.
Price, P. B.
core +1 more source
Impacts of Extreme Ultraviolet Late Phase of the Solar Flare on Ionospheric Electrodynamics
The Astrophysical Journal LettersPrevious investigations of ionospheric electrodynamical responses to solar flares primarily focused on the main phases (MPs) of solar flares. Typical solar irradiance models for driving global ionosphere models do not include the extreme ultraviolet (EUV)
Xuanqing Liu +7 more
doaj +1 more source
Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24
UniverseIn this study, we performed periodicity analyses of selected daily solar (flare index, coronal index, number of coronal mass ejections), geomagnetic (planetary equivalent range index, disturbance storm time index, interplanetary magnetic field) and ...
Ali Kilcik +2 more
doaj +1 more source
The Astrophysical JournalSun-as-a-star analyses serve as a bridge for comparative studies on solar and stellar activities. To investigate the typical Sun-as-a-star H α temporal spectral characteristics in solar eruption source regions, we analyzed five different types of solar ...
Xiaofeng Liu +8 more
doaj +1 more source
The Astrophysical JournalEffects of the extreme-ultraviolet (EUV) late phase of solar flares on the ionosphere were rarely studied. Here we simulated such effects on the ionospheric electron density using an ionosphere−thermosphere coupled model driven by the realistic solar ...
Xuanqing Liu +7 more
doaj +1 more source
The Astrophysical Journal LettersThis Letter proposes that the ion temperature is several times the local electron temperature in the hot onset phase and in the above-the-loop region of solar flares.
Alexander J. B. Russell +4 more
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Heating manifestations at the onset of the 29 June 2012 flare
Solar-Terrestrial PhysicsAnalysis of GOES data for the SOL2012-06-29T04:09 flare, class C4.6, shows a thermal character of the energy release for several minutes before the impulsive stage.
Meshalkina N. S., Altyntsev A. T.
doaj +1 more source
The 2024 July 23 Event: A Case Study of a Multispacecraft, Fe-rich Solar Energetic Particle Event
The Astrophysical JournalOccasionally, solar energetic particle (SEP) events associated with fast, wide coronal mass ejections (CMEs) driving interplanetary shocks exhibit Fe/O abundance ratios that are significantly higher than the nominal value of 0.134.
C. M. S. Cohen +14 more
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