531 citations · 4.4k across the 119 of their papers we have counts for
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Performance-portable GPU acceleration of the hybrid particle-in-cell code dHybridR
Bricker Ostler, Miha Cernetic, Damiano Caprioli
Hybrid particle-in-cell simulations are widely used to study kinetic processes in collisionless astrophysical and space plasmas, yet the high computational cost of large-scale thre…
Importance of the Resonant Cosmic-Ray Streaming Instability Upstream of Collisionless Shocks
Bricker Ostler, Benedikt Schroer, Damiano Caprioli
Cosmic rays (CRs) escaping collisionless shocks form a dilute, relativistic population whose current amplifies the upstream magnetic field, a process widely attributed to the non-r…
Measuring Small-scale Turbulence in Supernova Remnants with Jitter Radiation
Emily Simon, Damiano Caprioli, Niccolò Bucciantini +2
Hard X-ray emission from Cas A has been attributed to jitter radiation, implying magnetic turbulence on scales near or below the ion Larmor radius. We propose these fields arise fr…
Hybrid Simulations of Proton Acceleration at Oblique High- Shocks
Yevhen Kylivnyk, Damiano Caprioli, Luca Orusa
Collisionless shocks in the intracluster and intergalactic medium (ICM/IGM) are expected to energize both electrons and ions. While electron acceleration is revealed by prominent r…
SN 1006: A Cosmic Laboratory for Investigating Shock Acceleration Physics
Emma McGinness, Rebecca Diesing, Damiano Caprioli +1
SN 1006 is a historical Type Ia supernova remnant that exhibits non-thermal emission ranging from radio to multi-TeV -rays. Most of this emission (particularly X-rays and -ra…
Entity -- Hardware-agnostic Particle-in-Cell Code for Plasma Astrophysics. III: Higher-order shape functions & generalized field stencils
Ludwig M. Böss, Arno Vanthieghem, Hayk Hakobyan +2
Modern particle-in-cell (PIC) codes have become an integral tool in plasma astrophysics. As most plasma phenomena grow from initially small instabilities, it is important to ensure…
Hybrid Simulations of Supersonic Shear Flows: II) Cosmic Ray Viscosity
Naixin Liang, Damiano Caprioli
In this second paper in a series dedicated to characterizing shear layers via 2D hybrid (kinetic ions -- fluid electrons) simulations, we study the dynamical role of nonthermal par…
Detecting Neutrino Emission from Supernova Remnants: A Theoretically Motivated Target Catalog
Emily Simon, Rebecca Diesing, Damiano Caprioli +1
Galactic supernova remnants (SNRs) are thought to accelerate cosmic rays (CRs) to several PeV energies, but this has yet to be confirmed as general behavior. Although several sourc…
Particle Acceleration in Magnetized Shear-Driven Turbulence
Mingxuan Liu, Mateusz Ruszkowski, Ellen Zweibel +5
Shear flows, ubiquitous in space and astrophysical plasmas, can accelerate particles through turbulence excited by the Kelvin-Helmholtz instability. We present the first numerical…
Hybrid Simulations of Supersonic Shear Flows: I) Particle Acceleration
Naixin Liang, Damiano Caprioli
Supersonic flows are ubiquitous in warm and cool media; their dissipation leads to heating, generation of nonthermal particles, and amplification of background magnetic fields. We…
Deep Learning Analysis of Ions Accelerated at Shocks
Paxson Swierc, Damiano Caprioli, Luca Orusa +1
We study the application of deep learning techniques to the analysis and classification of ions accelerated at collisionless shocks in hybrid (kinetic ions--fluid electrons) simula…
Acceleration of Heavy Ions at Non-Relativistic Collisionless Shocks
Damiano Caprioli, Luca Orusa, Miha Cernetic +2
We investigate the process of Diffusive Shock Acceleration (DSA) of particles with mass number to charge number ratios , e.g., partially-ionized heavy ions. To this end, w…
Shock Acceleration in the Intracluster Medium: Implications of Micromirror Confinement
Rebecca Diesing, Ludwig Böss, Damiano Caprioli
Merging galaxy clusters exhibit strong observational evidence for efficient particle acceleration in the intracluster medium (ICM), particularly in the form of synchrotron-emitting…
Investigating Nonlinear Landau Damping in Hybrid Simulations
Benedikt Schroer, Damiano Caprioli, Pasquale Blasi
Phenomenological studies of cosmic-ray self-confinement often hinge on the linear theory for the growth rate of the streaming instability and for the damping rate of the generated…
Efficient Particle Acceleration in 2.5-Dimensional, Hybrid-Kinetic Simulations of Decaying, Supersonic, Plasma Turbulence
Keyan Gootkin, Colby Haggerty, Damiano Caprioli +1
Collisionless, turbulent plasmas surround the Earth, from the magnetosphere to the intergalactic medium, and the fluctuations within them affect nearly every field in the space sci…
A "Faux-Shock" Method for Hybrid Simulations of Astrophysical Shocks
Emily R. Simon, Damiano Caprioli, Colby C. Haggerty +1
We demonstrate a novel setup for hybrid particle-in-cell simulations designed to isolate the physics of the shock precursor over long time periods for significantly lower computati…
The role of three-dimensional effects on ion injection and acceleration in perpendicular shocks
Luca Orusa, Damiano Caprioli, Lorenzo Sironi +1
Understanding the conditions that enable particle acceleration at non-relativistic collisionless shocks is essential to unveil the origin of cosmic rays. We employ 2D and 3D hybrid…
Speed-dependent Threshold for Electron Injection into Diffusive Shock Acceleration
Siddhartha Gupta, Damiano Caprioli, Anatoly Spitkovsky
Finding the injection threshold for diffusive shock acceleration (DSA) of electrons in collisionless shocks has been a longstanding unsolved problem. Using first-principles kinetic…
Plasma Instabilities Dominate Radioactive Transients Magnetic Fields: The self-confinement of leptons in Type Ia and Core-Collapse Supernovae, and Kilonovae
Dhvanil D. Desai, Colby C. Haggerty, Benjamin J. Shappee +8
The light curves of radioactive transients, such as supernovae and kilonovae, are powered by the decay of radioisotopes, which release high-energy leptons through and d…
Revealing an unexpectedly low electron injection threshold via reinforced shock acceleration
Savvas Raptis, Ahmad Lalti, Martin Lindberg +3
Collisionless shock waves, found in supernova remnants, interstellar, stellar, and planetary environments, and laboratories, are one of nature's most powerful particle accelerators…
Revisiting Propagation Delays of Ultra-High-Energy Cosmic Rays from Long-lived Sources
Rostom Mbarek, Damiano Caprioli
We revisit the time delay incurred during ultra-high energy cosmic ray (UHECR) propagation over cosmological distances and its potential impact on the correlation between UHECR dir…
Understanding Streaming Instabilities in the Limit of High Cosmic Ray Current Density
Emily Lichko, Damiano Caprioli, Benedikt Schroer +1
A critical component of particle acceleration in astrophysical shocks is the non-resonant (Bell) instability, where the streaming of cosmic rays (CRs) leads to the amplification of…
Ultrahigh-energy neutrinos as a probe of espresso-shear acceleration in jets of Centaurus A
Rostom Mbarek, Damiano Caprioli, Kohta Murase
It has been suggested that Centaurus A (Cen A) could make a contribution to the observed ultrahigh-energy cosmic-ray (UHECR) flux. We calculate the flux of astrophysical neutrinos…
The role of non-linear Landau damping for cosmic-ray transport
Benedikt Schroer, Damiano Caprioli, Pasquale Blasi
We present the first assessment, using hybrid PIC simulations, of the role of non-linear Landau damping in the process of self-generated scattering in a high plasma, conditions…