Non-thermal processes in cosmological simulations
نویسنده
چکیده
Non-thermal components are key ingredients for understanding clusters of galaxies. In the hierarchical model of structure formation, shocks and large-scale turbulence are unavoidable in the cluster formation processes. Understanding the amplification and evolution of the magnetic field in galaxy clusters is necessary for modelling both the heat transport and the dissipative processes in the hot intra-cluster plasma. The acceleration, transport and interactions of non-thermal energetic particles are essential for modelling the observed emissions. Therefore, the inclusion of the non-thermal components will be mandatory for simulating accurately the global dynamical processes in clusters. In this review, we summarise the results obtained with the simulations of the formation of galaxy clusters which address the issues of shocks, magnetic field, cosmic ray particles and turbulence.
منابع مشابه
Thermodynamic evolution of cosmological baryonic gas: I. Influence of non-equipartition processes
Using N-body/hydrodynamic simulations, the influence of non-equipartition processes on the thermal and dynamical properties of cosmological baryonic gas is investigated. We focus on a possible departure from equilibrium between electrons, ions and neutral atoms in low temperature (10–10 K) and weakly ionized regions of the intergalactic medium. The simulations compute the energy exchanges betwe...
متن کاملSimulations of Cold Electroweak Baryogenesis∗
Cold Electroweak Baryogenesis is an attempt to explain the cosmological baryon asymmetry using only a minimal extension of the Standard Model. The relevant processes take place out of thermal equilibrium and are non-perturbative, and so must be studied using full, real-time lattice simulations. We present new results on the dependence on CP-violation and the Higgs-toW mass ratio. c Copyright ow...
متن کاملCosmological Shock Waves in the Large Scale Structure of the Universe: Non-gravitational Effects
Cosmological shock waves result from supersonic flow motions induced by hierarchical clustering of nonlinear structures in the universe. These shocks govern the nature of cosmic plasma through thermalization of gas and acceleration of nonthermal, cosmic-ray (CR) particles. We study the statistics and energetics of shocks formed in cosmological simulations of a concordance ΛCDM universe, with a ...
متن کاملSimulations of cosmic ray feedback by AGN in galaxy clusters
Feedback processes by active galactic nuclei (AGN) appear to be a key for understanding the nature of the very X–ray luminous cool cores found in many clusters of galaxies. We investigate a numerical model for AGN feedback where for the first time a relativistic particle population in AGN-inflated bubbles is followed within a full cosmological context. In our high-resolution simulations of gala...
متن کاملOn the role of cosmic rays in clusters of galaxies
dissipative processes in the relativistic gas component. To this end, I develop a formalism for the identification and accurate estimation of the strength of structure formation shocks during cosmological smoothed particle hydrodynamics simulations. Shocks not only play a decisive role for the thermalization of gas in virializing structures but also for the acceleration of CRs through diffusive...
متن کامل