Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical …

M Ruszkowski, C Pfrommer - The Astronomy and Astrophysics Review, 2023 - Springer
Understanding the physical mechanisms that control galaxy formation is a fundamental
challenge in contemporary astrophysics. Recent advances in the field of astrophysical …

Proton acceleration in thermonuclear nova explosions revealed by gamma rays

VA Acciari, S Ansoldi, LA Antonelli, A Arbet Engels… - Nature …, 2022 - nature.com
Classical novae are cataclysmic binary star systems in which the matter of a companion star
is accreted on a white dwarf,. Accumulation of hydrogen in a layer eventually causes a …

Electron–Ion Temperature Ratio in Astrophysical Shocks

JC Raymond, P Ghavamian, A Bohdan… - The Astrophysical …, 2023 - iopscience.iop.org
Collisionless shock waves in supernova remnants and the solar wind heat electrons less
effectively than they heat ions, as is predicted by kinetic simulations. However, the values of …

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 …

EMU Detection of a Large and Low Surface Brightness Galactic SNR G288. 8–6.3

MD Filipović, S Dai, B Arbutina… - The Astronomical …, 2023 - iopscience.iop.org
We present the serendipitous detection of a new Galactic supernova remnant (SNR), G288.
8–6.3, using data from the Australian Square Kilometre Array Pathfinder (ASKAP) …

Cosmic ray electrons released by supernova remnants

G Morlino, S Celli - Monthly Notices of the Royal Astronomical …, 2021 - academic.oup.com
The process that allows cosmic rays (CRs) to escape from their sources and be released
into the Galaxy is still largely unknown. The comparison between CR electron and proton …

Cosmic-Ray Acceleration and Nonthermal Radiation at Accretion Shocks in the Outer Regions of Galaxy Clusters

JH Ha, D Ryu, H Kang - The Astrophysical Journal, 2023 - iopscience.iop.org
Cosmology models predict that external accretion shocks form in the outer region of galaxy
clusters owing to supersonic gas infall from filaments and voids in the cosmic web. They are …

Electron acceleration in supernova remnants

A Bohdan - Plasma physics and controlled fusion, 2022 - iopscience.iop.org
Supernova remnants (SNRs) are believed to produce the majority of galactic cosmic rays
(CRs). SNRs harbor non-relativistic collisionless shocks responsible for the acceleration of …

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 …

Return Currents in Collisionless Shocks

S Gupta, D Caprioli, A Spitkovsky - The Astrophysical Journal, 2024 - iopscience.iop.org
Collisionless shocks tend to send charged particles into the upstream, driving electric
currents through the plasma. Using kinetic particle-in-cell simulations, we investigate how …