Investigating the Origins of Two Extreme Solar Particle Events: Proton Source Profile and Associated Electromagnetic Emissions [PDF]
The Astrophysical Journal, 2017 Abstract We analyze the high-energy particle emission from the Sun in two extreme solar particle events in which protons are accelerated to relativistic energies and can cause a significant signal even in the ground-based particle detectors.
Leon Kocharov +15 more
core +7 more sources
Detection of Radio Emission from Superflaring Solar-type Stars in the VLA Sky Survey [PDF]
The Astrophysical JournalSolar-type stars have been observed to flare at optical wavelengths with energies much higher than is observed for the Sun. To date, no counterparts have been observed at longer wavelengths.
Ivey Davis +4 more
doaj +3 more sources
Letter to the Editor
UHF electromagnetic emission stimulated by HF pumping of the ionosphere [PDF]
Annales Geophysicae, 2002 UHF electromagnetic emission (with a frequency near 600 MHz) from the F-region of the ionosphere pumped by an HF powerful radio wave is revealed. Possible mechanisms of the emission excitation, such as plasma mode con-version, scattering or Earth ...
S. M. Grach +6 more
doaj +1 more source
Aerospace, 2023 Models of particle acceleration in solar eruptive events suggest that roughly equal energy may go into accelerating electrons and ions. However, while previous solar X-ray spectroscopic imagers have transformed our understanding of electron acceleration,
Daniel F. Ryan +36 more
doaj +1 more source
The Astrophysical Journal, 2023 Gradual solar proton events are thought to consist of solar components originating near the Sun and interplanetary components associated with interplanetary shocks, and the role of interplanetary shocks is considered to be crucial in supplying particles ...
Yang Wang, Gang Qin
doaj +1 more source
Particle acceleration in the presence of weak turbulence at an X-type neutral point [PDF]
, 2012 We simulate the likely noisy situation near a reconnection region by superposing many 2D linear reconnection eigenmodes. The superposition of modes on the steady state X-type magnetic field creates multiple X- and O-type neutral points close to the ...
Petkaki, P. +4 more
core +1 more source
THE EFFECT OF TURBULENCE INTERMITTENCE ON THE EMISSION OF SOLAR ENERGETIC PARTICLES BY CORONAL AND INTERPLANETARY SHOCKS [PDF]
The Astrophysical Journal, 2013 Major solar energetic particle events are associated with shock waves in solar corona and solar wind. Fast scattering of charged particles by plasma turbulence near the shock wave increases the efficiency of the particle acceleration in the shock, but prevents particles from escaping ahead of the shock.
Kocharov, Leon +2 more
openaire +1 more source
Laboratory astrophysics : investigation of planetary and astrophysical maser emission [PDF]
, 2013 This paper describes a model for cyclotron maser emission applicable to planetary auroral radio emission, the stars UV Ceti and CU Virginus, blazar jets and astrophysical shocks.
Ronald K +27 more
core +1 more source
GEANT4 SIMULATIONS OF GAMMA-RAY EMISSION FROM ACCELERATED PARTICLES IN SOLAR FLARES [PDF]
The Astrophysical Journal, 2010 Gamma-ray spectroscopy provides diagnostics of particle acceleration in solar flares, but care must be taken when interpreting the spectra due to effects of the angular distribution of the accelerated particles (such as relativistic beaming) and Compton reprocessing of the radiation in the solar atmosphere.
Tang, Shichao, Smith, David M.
openaire +2 more sources
On solar protons and polar cap absorption: Constraints on an empirical relationship [PDF]
, 2004 International audienceA large database of Solar Proton Events (SPE) from the period 1995 to 2001 is used to investigate the relationship between proton flux at geostationary orbit and Cosmic Noise Absorption (CNA) in the auroral zone. The effect of solar
A. Senior +9 more
core +1 more source