Particle Acceleration in Shearing Flows: Efficiencies and Limits
arXiv:1911.05348 · doi:10.3847/2041-8213/ab563f
Abstract
We examine limits to the efficiency for particles acceleration in shearing flows, showing that relativistic flow speeds are required for efficient gradual shear acceleration. We estimate maximum achievable particle energies for parameters applicable to relativistic AGN jets. The implications of our estimates is that if large-scale jets are relativistic, then efficient electron acceleration up to several PeV, and proton acceleration up to several EeV energies appears feasible. This suggests that shear particle acceleration could lead to a continued energization of synchrotron X-ray emitting electrons, and be of relevance for the production of ultra-high-energy cosmic-ray particles.
ApJL accepted, 5 pages, 2 figures
References in corpus (27)
- X-ray Emission from Extragalactic Jets
- Open Questions in Cosmic-Ray Research at Ultrahigh Energies
- Systematic properties of decelerating relativistic jets in low-luminosity radio galaxies
- A numerical simulation of the evolution and fate of a FRI jet. The case of 3C 31
- Shear acceleration in relativistic astrophysical jets
- Limb-Brightened Jet of 3C 84 Revealed by the 43-GHz Very-Long-Baseline-Array Observation
- Formation of dynamical structures in relativistic jets: the FRI case
- The stratified two-sided jet of Cygnus A. Acceleration and collimation
- "Espresso" Acceleration of Ultra-high-energy Cosmic Rays
- Ultra-high energy cosmic rays from shocks in the lobes of powerful radio galaxies
- Ultrahigh-energy Cosmic-ray Nuclei from Black Hole Jets: Recycling Galactic Cosmic Rays through Shear Acceleration
- An Introduction to Particle Acceleration in Shearing Flows
- The jet of Markarian 501 from millions of Schwarzschild radii down to a few hundreds
- A microscopic analysis of shear acceleration
- Generalized Fermi acceleration
- Are Spine--Sheath Polarization Structures in the Jets of Active Galactic Nuclei Associated with Helical Magnetic Fields?
- Cosmic Ray Models
- Particle Acceleration in Mildly Relativistic Shearing Flows: the Interplay of Systematic and Stochastic Effects, and the Origin of the Extended High-energy Emission in AGN Jets
- Long-term FRII jet evolution: Clues from three-dimensional simulations
- First-Epoch VLBA Imaging of Twenty New TeV Blazars
- Detection of Superluminal Motion in the X-Ray Jet of M87
- The TeV blazar Markarian 421 at the highest spatial resolution
- Shear Acceleration in Expanding Flows
- Boundary Shear Acceleration in the Jet of MKN501
- Relativistic Shear Flow Between Electron-Ion and Electron-Positron Plasmas and Astrophysical Applications
- On radiative acceleration in spine-sheath structured blazar jets
- Approaching the black hole by numerical simulations
Cited by in corpus (19)
- Particle acceleration in astrophysical jets
- Constraining the shear acceleration model for the X-ray emission of large-scale extragalactic jets
- Scrutinizing FR 0 Radio Galaxies as Ultra-High-Energy Cosmic Ray Source Candidates
- Particle acceleration in shearing flows: the self-generation of turbulent spine-sheath structures in relativistic MHD jet simulations
- Particle acceleration in shearing flows: the case for large-scale jets
- Long-term FRII jet evolution in dense environments
- Neutrinos from stochastic acceleration in black hole environments
- Flux variability from ejectas in structured relativistic jets with large-scale magnetic fields
- Nuclear and electromagnetic cascades induced by ultrahigh-energy cosmic rays in radio galaxies: implications for Centaurus A
- Turbulence and Particle Acceleration in Shearing Flows
- Jet-Feedback on kpc scales: a review
- The prototype X-ray binary GX 339-4: using TeV gamma-rays to assess LMXBs as Galactic cosmic ray accelerators
- Ultra high energy cosmic rays from past activity of Andromeda galaxy
- How do recollimation-induced instabilities shape the propagation of hydrodynamic relativistic jets?
- Acceleration of cosmic rays in presence of magnetohydrodynamic fluctuations at small scales
- Comprehensive study of magnetic field evolution in relativistic jets based on 2D simulations
- Particle Acceleration in Relativistic Shearing Flows: Energy Spectrum
- Effects of radiative losses on the relativistic jets of high-mass microquasars
- Numerical modeling and physical interplay of stochastic turbulent acceleration for non-thermal emission processes