Critical self-organization of astrophysical shocks

Abstract

There are two distinct regimes of the first order Fermi acceleration at shocks. The first is a linear (test particle) regime in which most of the shock energy goes into thermal and bulk motion of the plasma. The second is an efficient regime when it goes into accelerated particles. Although the transition region between them is narrow, we identify the factors that drive the system to a {\it self-organized critical state} between those two. Using an analytic solution, we determine this critical state and calculate the spectra and maximum energy of accelerated particles.

To appear in ApJL, Sec.3 extensively rewritten, 4 pages, Latex, emulateapj.sty, epsf

References in corpus (3)

• High Energy Neutrinos from Astrophysical Sources: An Upper Bound
• Analytic solution for nonlinear shock acceleration in the Bohm limit
• Ion leakage from quasiparallel collisionless shocks: implications for injection and shock dissipation

Cited by in corpus (44)

• Cosmic ray acceleration and escape from supernova remnants
• On the role of injection in kinetic approaches to nonlinear particle acceleration at non-relativistic shock waves
• Non linear particle acceleration at non-relativistic shock waves in the presence of self-generated turbulence
• Giant radio relics in galaxy clusters: reacceleration of fossil relativistic electrons?
• A semi-analytical approach to non-linear shock acceleration
• Radio, X-ray, and gamma-ray Emission Models of the Colliding Winds Binary WR 140
• Cosmic ray physics in calculations of cosmological structure formation
• Dynamical Feedback of Self-generated Magnetic Fields in Cosmic Ray Modified Shocks
• A general solution to non-linear particle acceleration at non-relativistic shock waves
• Cosmic-ray acceleration in supernova remnants: non-linear theory revised
• Numerical Studies of Cosmic Ray Injection and Acceleration
• On the escape of particles from cosmic ray modified shocks
• The maximum momentum of particles accelerated at cosmic ray modified shocks
• Non-linear shock acceleration in the presence of seed particles
• Efficiency of Nonlinear Particle Acceleration at Cosmic Structure Shocks
• Kinetic Simulations of Cosmic-Ray-Modified Shocks I: Hydrodynamics
• A Generalized Model of Nonlinear Diffusive Shock Acceleration Coupled to an Evolving Supernova Remnant
• Shock Acceleration of Cosmic Rays - a critical review
• Comparison of Different Methods for Nonlinear Diffusive Shock Acceleration
• Cosmic Ray History and its Implications for Galactic Magnetic Fields
• Steady-State Solutions in Nonlinear Diffusive Shock Acceleration
• Collisionless shocks in a partially ionized medium: III. Efficient cosmic ray acceleration
• Shock Speed, Cosmic Ray Pressure, and Gas Temperature in the Cygnus Loop
• Nonlinear shock acceleration beyond the Bohm limit
• Long-term optical variability of PKS 2155-304
• A cosmic-ray precursor model for a Balmer-dominated shock in Tycho's supernova remnant
• Non-Maxwellian Proton Velocity Distributions in Nonradiative Shocks
• Dynamics of Mesoscale Magnetic Field in Diffusive Shock Acceleration
• Steep Cosmic Ray Spectra with Revised Diffusive Shock Acceleration
• Evidence for multiple shocks from the $\gamma$-ray emission of RS Ophiuchi
• Self-Organizing Systems in Planetary Physics: Harmonic Resonances of Planet and Moon Orbits
• Diffuse Galactic Gamma Rays at intermediate and high latitudes. I. Constraints on the ISM properties
• Kinetic approaches to particle acceleration at cosmic ray modified shocks
• Cosmic Ray Acceleration during Large Scale Structure Formation
• On The Origin of Very High Energy Cosmic Rays
• On the possible reason for non-detection of TeV-protons in SNRs
• Hadronic versus leptonic origin of gamma-ray emission from supernova remnants
• UHECR as Decay Products of Heavy Relics? The Lifetime Problem
• Particle acceleration at shock waves: particle spectrum as a function of the equation of state of the shocked plasma
• Particle Acceleration at shocks: some modern aspects of an old problem
• Stability of Cosmic Ray Modified Shocks: Two-Fluid Approach
• The origin of ultra high energy cosmic rays
• On the stability of shocks with particle pressure
• UHECR Acceleration in Dark Matter Filaments of Cosmological Structure Formation