Electron Acceleration at Quasi-parallel Nonrelativistic Shocks: A 1D Kinetic Survey

S Gupta, D Caprioli, A Spitkovsky - The Astrophysical Journal, 2024 - iopscience.iop.org
We present a survey of 1D kinetic particle-in-cell simulations of quasi-parallel nonrelativistic
shocks to identify the environments favorable for electron acceleration. We explore an …

Kinetic Simulations of Nonrelativistic High-mach-number Perpendicular Shocks Propagating in a Turbulent Medium

K Fulat, A Bohdan, GT Paz, M Pohl - The Astrophysical Journal, 2023 - iopscience.iop.org
Strong nonrelativistic shocks are known to accelerate particles up to relativistic energies.
However, for diffusive shock acceleration, electrons must have a highly suprathermal …

Electron resonant interaction with whistler-mode waves around the Earth's bow shock I: The probabilistic approach

X Shi, DS Tonoian, AV Artemyev, XJ Zhang… - Physics of …, 2023 - pubs.aip.org
Adiabatic heating of solar wind electrons at the Earth's bow shock and its foreshock region
produces transversely anisotropic hot electrons that, in turn, generate intense high …

Nonlinear diffusive shock acceleration of cosmic rays: quasi-thermal and non-thermal particle distributions

B Arbutina - The European Physical Journal Plus, 2023 - Springer
Diffusive shock acceleration (DSA) of particles at collisionless shocks is the major accepted
paradigm about the origin of cosmic rays (CRs). As a theory, it was developed during the …

PeVatron candidate SNR G106. 3+ 2.7 in a low-density cavity: a multiwavelength test

Y Bao, RY Liu, C Ge, Y Chen - Monthly Notices of the Royal …, 2024 - academic.oup.com
In this paper, we constrain the density of the interstellar medium (ISM) around the hadronic
PeVatron candidate, supernova remnant (SNR) G106. 3+ 2.7, based on X-ray and γ-ray …

Second Maximum of SN 2019stc: Collision with a Circumstellar Shell?

NN Chugai, VP Utrobin - Astronomy Letters, 2023 - Springer
We consider scenario of a supernova interaction with a circumstellar shell proposed earlier
to account for the second maximum in the light curve of the superluminous supernova …

Kinetic simulations comparing quasi-parallel and quasi-perpendicular piston-driven collisionless shock dynamics in magnetized laboratory plasmas

P Pongkitiwanichakul, DB Schaeffer, W Fox… - Physics of …, 2024 - pubs.aip.org
Magnetized collisionless shocks are common in astrophysical systems, and scaled versions
can be created in laboratory experiments by utilizing laser-driven piston plasmas to create …

[HTML][HTML] Nonthermal particle spectra in ultra-intense laser–plasma interaction

Y Hu, X Geng, H Takabe, Y Kuramitsu, J Zhu, L Ji… - Physics of …, 2024 - pubs.aip.org
Relativistic laser–plasma interaction can produce nonthermal electron spectra in power-law
scaling. The power-law index for near-critical density plasmas changes between 1.8 and 2.0 …

Nonthermal Acceleration of Electrons, Positrons and Protons at a Nonrelativistic Quasiparallel Collisionless Shock

H Yu, Q Xia, J Fang - arXiv preprint arXiv:2405.19611, 2024 - arxiv.org
Energetic positrons have been observed in the interstellar medium, and high-energy
positrons with relativistic energies up to approximately 1 TeV have been detected in Galactic …

[PDF][PDF] PIC simulations of SNRs shocks with a turbulent upstream medium

K Fulat, A Bohdan, GT Paz, M Tsirou𝑒… - 38th International Cosmic …, 2023 - pos.sissa.it
Understanding the acceleration of particles at shock waves is a crucial challenge for
astrophysics and space physics. Although diffusive shock acceleration (DSA;[1]) is …