Large Scale Impact of the Cosmological Population of Expanding Radio Galaxies

Abstract

We seek to compute the fraction of the volume of the Universe filled by expanding cocoons of the cosmological population of radio galaxies over the Hubble time as well as the magnetic field infused by them, in order to assess their importance in the cosmic evolution of the Universe. Using N-body $\Lambda$CDM simulations, radio galaxies distributed according to the observed radio luminosity function are allowed to evolve in a cosmological volume as using well defined prescriptions for their expansion. We find that the radio galaxies permeate $10-30$ of the total volume with $\sim 10^{-8}$ G magnetic field by the present epoch.

arXiv comment5 pages, 3 figures, ApJL. This is slightly longer than the version accepted for publication and has colored figures

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• Kinetic or thermal AGN feedback in simulations of isolated and merging disk galaxies calibrated by the M-sigma relation
• Intermediate-Mass Black Hole Growth and Feedback in Dwarf Galaxies at High Redshifts
• Inverse-Compton ghosts and double-lobed radio sources in the X-ray sky
• SPH Simulations of Black Hole Accretion: A Step to Model Black Hole Feedback in Galaxies
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• AGN hosting jets. I: A semi-analytical model for the evolution of radio galaxies