Alfvénic reacceleration of relativistic particles in galaxy clusters in the presence of secondary electrons and positrons

@article{Brunetti2005AlfvnicRO,
  title={Alfv{\'e}nic reacceleration of relativistic particles in galaxy clusters in the presence of secondary electrons and positrons},
  author={Gianfranco Brunetti and Pasquale Blasi},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2005},
  volume={363},
  pages={1173-1187}
}
  • G. Brunetti, P. Blasi
  • Published 3 August 2005
  • Physics
  • Monthly Notices of the Royal Astronomical Society
In a previous paper we presented the first self-consistent calculations of the time-dependent coupled equations for electrons, hadrons and Alfven waves in the intracluster medium, which describe the stochastic acceleration of the charged particles and the corresponding spectral modification of the waves. Under viable assumptions, this system of mutually interacting components was shown to accurately describe several observational findings related to the radio haloes in clusters of galaxies. In… 

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References

SHOWING 1-10 OF 71 REFERENCES

Alfvénic reacceleration of relativistic particles in galaxy clusters: MHD waves, leptons and hadrons

There is growing evidence that extended radio haloes are most likely generated by electrons reaccelerated via some kind of turbulence generated in the cluster volume during major mergers. It is well

Formation of radio halos in clusters of galaxies from cosmic-ray protons

Relativistic protons produced in radio galaxies in a cluster can diffuse over distances approx.1 Mpc in the intracluster medium before suffering inelastic collisions with thermal protons. This

Radio Halo Formation through Magnetoturbulent Particle Acceleration in Clusters of Galaxies

We develop a magnetoturbulent model for the cosmic-ray (CR) electrons seen in the radio halo clusters of galaxies. Steady-state momentum distribution functions of the CR electrons are calculated for

The Energy Spectrum of Primary Cosmic-Ray Electrons in Clusters of Galaxies and Inverse Compton Emission

Models for the evolution of the integrated energy spectrum of primary cosmic-ray electrons in clusters of galaxies have been calculated, including the effects of losses due to inverse Compton (IC),

Cosmic-Ray Electrons in Groups and Clusters of Galaxies: Primary and Secondary Populations from a Numerical Cosmological Simulation

We investigate the generation and distribution of high-energy electrons in the cosmic structure environment and their observational consequences by carrying out the first cosmological simulation that

Nonthermal Radiation from Clusters of Galaxies: The Role of Merger Shocks in Particle Acceleration

Nonthermal radiation is observed from clusters of galaxies in the radio, hard X-rays, and possibly in the soft X-ray/UV bands. While it is known that radiative processes related to nonthermal

Nonthermal Particles and Radiation Produced by Cluster Merger Shocks

We have developed a numerical model for the temporal evolution of particle and photon spectra resulting from nonthermal processes at the shock fronts formed in merging clusters of galaxies. Fermi

Particle reacceleration in the Coma cluster: radio properties and hard X‐ray emission

The radio spectral index map of the Coma halo shows a progressive steepening of the spectral index with increasing radius. Such a steepening cannot be simply justified by models involving continuous

On the Nonthermal Emission and Acceleration of Electrons in Coma and Other Clusters of Galaxies

Some clusters of galaxies, in addition to thermal bremsstrahlung (TB), emit detectable diffuse radiation from the intracluster medium (ICM) at radio, EUV, and hard X-ray (HXR) ranges. The radio

The nonthermal energy content and gamma ray emission of starburst galaxies and clusters of galaxies

The nonthermal particle production in contemporary starburst galaxies and in galaxy clusters is estimated from the Supernova rate, the iron content, and an evaluation of the dynamical processes which
...