Results 11 to 20 of about 1,700,755 (212)
Si
The Astrophysical Journal, 2006 The temperature dependence of the Si XII n = 3 and 4 dielectronic satellite line features at 5.82 and 5.56 A, respectively, near the Si XIII 1s2-1s3p and 1s2-1s4p lines (5.681 and 5.405 A), is calculated using atomic data presented here. The resulting theoretical spectra are compared with solar flare spectra observed by the RESIK spectrometer on the ...
Phillips, K. J. H. +3 more
openaire +5 more sources
Solar flares as proxy for the young Sun: satellite observed thermosphere response to an X17.2 flare of Earth's upper atmosphere [PDF]
Annales Geophysicae, 2012 We analyzed the measured thermospheric response of an extreme solar X17.2 flare that irradiated the Earth's upper atmosphere during the so-called Halloween events in late October/early November 2003.
S. Krauss +11 more
doaj +1 more source
Effects of Compton Scattering on the Gamma-Ray Spectra of Solar Flares [PDF]
Publications of the Astronomical Society of Japan, 2007 Abstract Using the fully relativistic GEANT4 simulation toolkit, Monte Carlo simulation was applied to the transport of energetic electrons generated in solar flares, and resultant bremsstrahlung gamma-ray spectra were calculated. The solar atmosphere was approximated by 10 vertically stacked zones.
Kotoku, Jun'ichi +5 more
openaire +2 more sources
An investigation of Fe XV emission lines in solar flare spectra [PDF]
Astronomy & Astrophysics, 2006 Previously, large discrepancies have been found between theory and observation for Fe XV emission line ratios in solar flare spectra covering the 224-327 A wavelength range, obtained by the Naval Research Laboratory's S082A instrument on board Skylab. These discrepancies have been attributed to either errors in the adopted atomic data or the presence ...
Keenan, Francis +4 more
openaire +2 more sources
The Astrophysical Journal, 2023 Quasi-periodic pulsation (QPP) is a common phenomenon in solar flares. Studying QPP is important to further our understanding of the physical processes operating in flares.
Yangfan Guo +6 more
doaj +1 more source
Topological structure of the magnetic solar corona [PDF]
, 2007 The solar corona is a highly complex and active plasma environment, containing many exotic phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright points.
Maclean, Rhona Claire
core +2 more sources
Particle Acceleration and Their Escape into the Heliosphere in Solar Flares with Open Magnetic Field
The Astrophysical Journal, 2023 Energetic particle populations in the solar corona and in the heliosphere appear to have different characteristics even when produced in the same solar flare.
Mykola Gordovskyy +4 more
doaj +1 more source
Muon and Tau Neutrinos Spectra from Solar Flares [PDF]
Chinese Journal of Astronomy and Astrophysics, 2003 Solar neutrino flares and mixing are considered. Most power-full solar flare as the ones occurred on 23th February 1956, September 29th 1989, 28th October and on 2nd-4th November 2003 are sources of cosmic rays, X, gamma and neutrino bursts. These flares took place both on front or in the edge and in the hidden solar disk.
Fargion, D., Moscato, F.
openaire +3 more sources
The Astrophysical Journal, 2023 We often find spectral signatures of chromospheric cold plasma ejections accompanied by flares in a wide range of spatial scales in the solar and stellar atmospheres.
Yuji Kotani +6 more
doaj +1 more source
Modeling Solar Energetic Neutral Atoms from Solar Flares and CME-driven Shocks
The Astrophysical Journal, 2023 We examine the production of energetic neutral atoms (ENAs) in solar flares and coronal mass ejection (CME)-driven shocks and their subsequent propagation to 1 au. Time profiles and fluence spectra of solar ENAs at 1 au are computed for two scenarios: (1)
Gang Li +7 more
doaj +1 more source