Hadronic Gamma Rays from Supernova Remnants (2007)
Moskalenko, I. V., Porter, T. A., Malkov, M. A., Diamond, P. H.
A gas cloud near a supernova remnant (SNR) provides a target for pp-collisions leading to subsequent gamma-ray emission through neutral pion decay. The assumption of a power-law ambient spectrum of...
Dynamics of Mesoscale Magnetic Field in Diffusive Shock Acceleration (2006)
We present a theory for the generation of mesoscale ($kr_{g}\ll 1$, where $r_{g}$ is the cosmic ray gyroradius) magnetic fields during diffusive shock acceleration. The decay or modulational...
Nonlinear shock acceleration beyond the Bohm limit (2005)
We suggest a physical mechanism whereby the acceleration time of cosmic rays by shock waves can be significantly reduced. This creates the possibility of particle acceleration beyond the knee energy...
Generation of Mesoscale Magnetic Fields and the Dynamics of Cosmic Ray Acceleration (2005)
The problem of the cosmic ray origin is discussed in connection with their acceleration in supernova remnant shocks. The diffusive shock acceleration mechanism is reviewed and its potential to...
Malkov, M. A., Diamond, P. H., Sagdeev, R. Z.
Cosmic rays (CRs) are thought to be accelerated in SNRs. The most favorable situation for proving that the main, hadronic CR component is accelerated there is when CRs interact with dense gases, such...
On the possible reason for non-detection of TeV-protons in SNRs (2001)
Malkov, M. A., Diamond, P. H., Jones, T. W.
The theory of shock acceleration predicts the maximum particle energy to be limited only by the acceleration time and the size (geometry) of the shock. This led to optimistic estimates for the...
Malkov, M. A., Diamond, P. H., Jones, T. W.
The linear theory of shock acceleration predicts the maximum particle energy to be limited only by the acceleration time and the size of the shock. We study the combined effect of acceleration...
Modern theory of Fermi acceleration: a new challenge to plasma physics (2001)
One of the main features of astrophysical shocks is their ability to accelerate particles to extremely high energies. The leading acceleration mechanism, the diffusive shock acceleration is reviewed....
Critical self-organization of astrophysical shocks (1999)
Malkov, M. A., Diamond, P. H., Voelk, H. J.
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...
Spectral universality of strong shocks accelerating charged particles (1998)
As a rule, the shock compression controls the spectrum of diffusively accelerated particles. We argue that this is not so if the backreaction of these particles on the shock structure is significant....
A simplified model of particle transport at a quasiparallel one-dimensional collisionless shock is suggested. In this model the MHD-turbulence behind the shock is dominated by a circularly polarized,...
The efficiency and uniqueness of the diffusive shock acceleration is studied on the basis of the novel kinetic solutions. These solutions obtained earlier (paper I, astro-ph/9707152) selfconsistently...
Analytic solution for nonlinear shock acceleration in the Bohm limit (1997)
The selfconsistent steady state solution for a strong shock, significantly modified by accelerated particles is obtained on the level of a kinetic description, assuming Bohm-type diffusion. The...
The asymptotic travelling wave solution of the KdV-Burgers equation driven by the long scale periodic driver is constructed. The solution represents a shock-train in which the quasi-periodic sequence...