Results 21 to 30 of about 1,495,918 (202)

Betatron Acceleration of Suprathermal Electrons within a Small-scale Flux Rope in the Solar Wind

The Astrophysical Journal Letters, 2023
A growing body of evidence from observations, theories, and simulations indicates that particles can be effectively accelerated in solar wind regions filled with dynamic small-scale flux ropes (FRs).
Weiduo Meng, Jianpeng Guo, Haibo Lin, Huishan Fu, Meng Zhou, Dan Zhao, Yan Chen, Linxia He, Xianghan Wang, Zelin Wang   +9 more
doaj   +1 more source

Acceleration of Solar Energetic Particles by the Shock of Interplanetary Coronal Mass Ejection [PDF]

The Astrophysical Journal, 2021
Abstract Interplanetary coronal mass ejection (ICME) shocks are known to accelerate particles and contribute significantly to solar energetic particle events. We have performed magnetohydrodynamic-particle in cell simulations of ICME shocks to understand the acceleration mechanism. These shocks vary in Alfvénic Mach numbers as well as in
Shanwlee Sow Mondal, Aveek Sarkar, Bhargav Vaidya, Andrea Mignone   +3 more
openaire   +2 more sources

Acceleration of Solar Wind Particles by Traveling Interplanetary Shocks [PDF]

The Astrophysical Journal, 2019
Abstract The acceleration of thermal solar wind (SW) protons at spherical interplanetary shocks driven by coronal mass ejections is investigated. The SW velocity distribution is represented using κ-functions, which are transformed in response to simulated shock transitions in the fixed-frame flow speed, plasma number density, and ...
P. L. Prinsloo, R. D. Strauss, J. A. le Roux   +2 more
openaire   +2 more sources

High-energy (>40 MeV) Proton Intensity Enhancements Associated with the Passage of Interplanetary Shocks at 1 au

The Astrophysical Journal, 2023
We analyze periods with elevated >40 MeV proton intensities observed near Earth over a time span of 43 yr (1973–2016) that coincide with the passage of interplanetary (IP) shocks.
D. Lario, I. G. Richardson, A. Aran, N. Wijsen   +3 more
doaj   +1 more source

Additional acceleration of solar-wind particles in current sheets of the heliosphere [PDF]

, 2015
Particles of fast solar wind in the vicinity of the heliospheric current sheet (HCS) or in a front of interplanetary coronal mass ejections (ICMEs) often reveal very peculiar energy or velocity profiles, density distributions with double or triple peaks,
V. Zharkova, Khabarova, Olga, V. Zharkova, O. Khabarova, Zharkova, Valentina   +4 more
core   +2 more sources

Solar flare particle acceleration in collapsing magnetic traps [PDF]

, 2012
Electronic redacted version excludes material for which permission has not been granted by the rights holderThe topic of this thesis is a detailed investigation of different aspects of the particle acceleration mechanisms operating in Collapsing Magnetic
Grady, Keith J.
core   +2 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight. [PDF]

Exp Physiol
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Holden AV.
europepmc   +2 more sources

A Data-driven, Physics-based Transport Model of Solar Energetic Particles Accelerated by Coronal Mass Ejection Shocks Propagating through the Solar Coronal and Heliospheric Magnetic Fields

The Astrophysical Journal Supplement Series, 2023
In an effort to develop computational tools for predicting radiation hazards from solar energetic particles (SEPs), we have created a data-driven physics-based particle transport model to calculate the injection, acceleration, and propagation of SEPs ...
Ming Zhang, Lei Cheng, Ju Zhang, Pete Riley, Ryun Young Kwon, David Lario, Laura Balmaceda, Nikolai V. Pogorelov   +7 more
doaj   +1 more source

Long-duration high-energy proton events observed by GOES in October 1989 [PDF]

Annales Geophysicae, 1998
We consider the prolonged injection of the high-energy (>10 MeV) protons during the three successive events observed by GOES in October 1989. We apply a solar-rotation-stereoscopy approach to study the injection of the accelerated particles from ...
A. Anttila, L. G. Kocharov, J. Torsti, R. Vainio   +3 more
doaj   +1 more source

On the acceleration of energetic particles in the interplanetary medium [PDF]

Journal of Geophysical Research, 1976
Fermi scattering and transit time damping are two possible mechanisms for accelerating low energy protons (approximately 1 Mev) in co-rotating particle streams. Solutions to the equations which govern particle behavior in such streams are presented. It was found that acceleration by Fermi scattering requires a scattering mean-free path more than an ...
openaire   +1 more source