Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Interplanetary particle acceleration"'
Autor:
Immanuel Christopher Jebaraj, Oleksiy Agapitov, Vladimir Krasnoselskikh, Laura Vuorinen, Michael Gedalin, Kyung-Eun Choi, Erika Palmerio, Nicolas Wijsen, Nina Dresing, Christina Cohen, Athanasios Kouloumvakos, Michael Balikhin, Rami Vainio, Emilia Kilpua, Alexandr Afanasiev, Jaye Verniero, John Grant Mitchell, Domenico Trotta, Matthew Hill, Nour Raouafi, Stuart D. Bale
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 1, p L8 (2024)
Collisionless shock waves, ubiquitous in the Universe, are crucial for particle acceleration in various astrophysical systems. Currently, the heliosphere is the only natural environment available for their in situ study. In this work, we showcase the
Externí odkaz:
https://doaj.org/article/779073aee96d4f7bb89e6601e659bc0a
Autor:
Xinnian Guo, Linghua Wang, Wenyan Li, Qianyi Ma, Liu Yang, Robert F. Wimmer-Schweingruber, Stuart D. Bale
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L12 (2024)
We present the first observations of in situ electron acceleration at corotating interaction region (CIR) shocks near 1 au, utilizing measurements from Wind and Magnetospheric Multiscale (MMS) mission in the interplanetary medium. As the forward (rev
Externí odkaz:
https://doaj.org/article/abfcb4f2be1440f7851614b4d88a26b4
Publikováno v:
The Astrophysical Journal Letters, Vol 964, Iss 2, p L31 (2024)
We report on the annual variation of quiet-time suprathermal heavy ion spectral indices for C through Fe in the energy range 0.3–1.28 MeV nuc ^−1 during Solar Cycle 23's rising phase through Solar Cycle 24's declining phase. These Advanced Compos
Externí odkaz:
https://doaj.org/article/f7d0e93c8acd4c248d647b7afb64473c
Publikováno v:
The Astrophysical Journal Letters, Vol 964, Iss 1, p L8 (2024)
We investigate the role of perpendicular diffusion in shaping the energetic ion spectrum in corotating interaction regions (CIRs), focusing on its mass-to-charge ( A / Q ) ratio dependence. We simulate a synthetic CIR using the EUropean Heliospheric
Externí odkaz:
https://doaj.org/article/abfd1116fa1d4dcc8598b3a892ed8510
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 93 (2024)
We report new theories and simulations for electron acceleration in magnetic islands generated by magnetic reconnection in the shock turbulence in a quasi-parallel shock, using a 2 and 1/2 dimensional particle-in-cell simulation. When an island is mo
Externí odkaz:
https://doaj.org/article/b59342e5cf344ac581cf520e2b4141df
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 28 (2024)
Recent observations by the Parker Solar Probe (PSP) suggest that protons and heavier ions are accelerated to high energies by magnetic reconnection at the heliospheric current sheet (HCS). By solving the energetic particle transport equation in large
Externí odkaz:
https://doaj.org/article/38bbe6671d9a453f8b7e60bd443928e3
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 47 (2024)
Understanding plasma dynamics and nonthermal particle acceleration in 3D magnetic reconnection has been a long-standing challenge. In this paper, we explore these problems by performing large-scale fully kinetic simulations of multi-X-line plasmoid r
Externí odkaz:
https://doaj.org/article/8acfd8db6ed84068a40b49c8b2feae7c
Autor:
George C. Ho, Glenn M. Mason, Robert C. Allen, Athanasios Kouloumvakos, Robert F. Wimmer-Schweingruber, Javier Rodrígzuez-Pacheco
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 68 (2024)
Multispacecraft observations of ^3 He-rich solar energetic particle (SEP) events are scarce, but much needed in order to understand and properly constrain the source and transport of these remarkably enriched ^3 He SEP events. In this paper, we repor
Externí odkaz:
https://doaj.org/article/d181e107fe4741b09e900f8682d23278
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 27 (2024)
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 upst
Externí odkaz:
https://doaj.org/article/b89b0286020e47e3be2d0ced6593cba0
Frequency-dispersed Ion Acoustic Waves in the Near-Sun Solar Wind: Signatures of Impulsive Ion Beams
Autor:
David M. Malaspina, Robert E. Ergun, Iver H. Cairns, Benjamin Short, Jaye L. Verniero, Cynthia Cattell, Roberto Livi
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 60 (2024)
This work reports a novel plasma wave observation in the near-Sun solar wind: frequency-dispersed ion acoustic waves. Similar waves have previously been reported in association with interplanetary shocks or planetary bow shocks, but the waves reporte
Externí odkaz:
https://doaj.org/article/9a4e596028c4492da53b8f2b180fb56c