Results 31 to 40 of about 13,868 (214)

Magnetic-reconnection-driven Turbulence and Turbulent Reconnection Acceleration

The Astrophysical Journal, 2023
This paper employs an MHD-PIC method to perform numerical simulations of magnetic-reconnection-driven turbulence and turbulent reconnection acceleration of particles.
Shi-Min Liang, Jian-Fu Zhang, Na-Na Gao, Hua-Ping Xiao   +3 more
doaj   +1 more source

An Improved Model for Relativistic Solar Proton Acceleration applied to the 2005 January 20 and Earlier Events

, 2008
This paper presents results on modelling the ground level response of the higher energy protons for the 2005 January 20 ground level enhancement (GLE). This event, known as GLE 69, produced the highest intensity of relativistic solar particles since the ...
D. J. Bombardieri, Fluckiger E., J. E. Humble, K. J. Michael, M. L. Duldig, Reames D, V, Shea M. A.   +6 more
core   +1 more source

Formation of the Injection Function of Solar Energetic Particles in Gradual Events

The Astrophysical Journal, 2023
We present a model for solar energetic particle injection into interplanetary space in gradual events, in which particle acceleration occurs in a limited region of the solar atmosphere.
Ivan Petukhov, Anastasia Petukhova, Stanislav Petukhov   +2 more
doaj   +1 more source

Flat Spectra of Energetic Particles in Interplanetary Shock Precursors

The Astrophysical Journal
The observed energy spectra of accelerated particles at interplanetary shocks often do not match the diffusive shock acceleration (DSA) theory predictions. In some cases, the particle flux forms a plateau over a wide range of energies, extending upstream
Mikhail Malkov, Joe Giacalone, Fan Guo
doaj   +1 more source

Sampling, Mobility, and Anchoring in Small‐Body Sampling Robots: A Comprehensive Review

SmartBot, EarlyView.
Small‐body sampling robots are exploration systems that perform contact, sampling, and stable operations on microgravity bodies such as asteroids and comets. The authors review representative robot architectures and key technologies, focusing on the mechanisms, evolution, and coupling of sampling, mobility, and anchoring.
Yurui Shen, Yixin Zhu, Mingxia Bao, Ting Zhang, Jun Wu, Jingbin Hao, Dezheng Hua, Xinhua Liu   +7 more
wiley   +1 more source

Three-stage Acceleration of Solar Energetic Particles Detected by Parker Solar Probe

The Astrophysical Journal Letters
Coronal mass ejections (CMEs) drive powerful shocks and thereby accelerate solar energetic particles (SEPs) as they propagate from the corona into interplanetary space.
Xiaomin Chen, Chuan Li
doaj   +1 more source

Particle scattering in turbulent plasmas with amplified wave modes [PDF]

, 2013
High-energy particles stream during coronal mass ejections or flares through the plasma of the solar wind. This causes instabilities, which lead to wave growth at specific resonant wave numbers, especially within shock regions. These amplified wave modes
Agueda, Bavassano, Bershadskii, Bigot, Bruno, Elsässer, F. Spanier, Goldreich, Goldreich, Hollweg, Howes, Jin, Jokipii, Kennel, Landi, Lange, Lee, M. Battarbee, Maron, Ng, Orszag, Qin, R. Vainio, Reames, S. Lange, Schlickeiser, Shalchi, Spanier, Sridhar, T. Laitinen, Tu, Vainio, Vainio, Vainio, Vay, Wisniewski   +35 more
core   +2 more sources

Breeding 5.0: Artificial intelligence (AI)‐decoded germplasm for accelerated crop innovation

Journal of Integrative Plant Biology, EarlyView.
ABSTRACT Crop breeding technologies are vital for global food security. While traditional methods have improved yield, stress tolerance, and nutrition, rising challenges such as climate instability, land loss, and pest pressure now demand new solutions.
Jiayi Fu, Shouzhi Zheng, Longjiang Fan, Xiaoming Zheng, Qian Qian   +4 more
wiley   +1 more source

ERNE observations of energetic particles associated with Earth-directed coronal mass ejections in April and May, 1997 [PDF]

Annales Geophysicae, 2000
Two Earth-directed coronal mass ejections (CMEs), which were most effective in energetic (~1–50 MeV) particle acceleration during the first 18 months since the Solar and Heliospheric Observatory (SOHO) launch, occurred on April 7 and May 12, 1997.
A. Anttila, T. Sahla
doaj   +1 more source

Coronal mass ejections, magnetic clouds, and relativistic magnetospheric electron events: ISTP [PDF]

, 1998
The role of high-speed solar wind streams in driving relativistic electron acceleration within the Earth\u27s magnetosphere during solar activity minimum conditions has been well documented.
Acuna, Baker, Baker, Baker, Baker, Baker, Baker, Baker, Blake, Blake, Burlaga, D. N. Baker, Feldman, G. D. Reeves, G. Rostoker, Gosling, H. E. Spence, Hruska, J. B. Blake, Kahler, Lepping, Li, Li, M. G. Henderson, Mayaud, Nishida, Ogilvie, Paulikas, Perreault, R. S. Selesnick, Reeves, Rostoker, Rostoker, S. G. Kanekal, T. I. Pulkkinen, Williams, X. Li   +36 more
core   +2 more sources