Radio source feedback in galaxy evolution

Abstract

We present a galaxy evolution model which incorporates a physically motivated implementation of AGN feedback. Intermittent jets inflate cocoons of radio plasma which then expand supersonically, shock heating the ambient gas. The model reproduces observed star formation histories to the highest redshifts for which reliable data exists, as well as the observed galaxy colour bimodality. Intermittent radio source feedback also naturally provides a way of keeping the black hole and spheroid growth in step. We find possible evidence for a top-heavy Initial Mass Function (IMF) for $z>2$, consistent with observations of element abundances, and sub-mm and Lyman break galaxy counts.

37 pages, 14 figures, ApJ (in press)

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• The duty cycle of radio galaxies revealed by LOFAR: remnant and restarted radio source populations in the Lockman Hole
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• Galaxy Zoo: dust lane early-type galaxies are tracers of recent, gas-rich minor mergers
• Size dependence of the radio luminosity - mechanical power correlation in radio galaxies
• Tools for computing the AGN feedback: radio-loudness distribution and the kinetic luminosity function
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• The many lives of active galactic nuclei-II: The formation and evolution of radio jets and their impact on galaxy evolution
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• Cold-gas outflows in typical low-redshift galaxies are driven by star formation, not AGN
• Dynamics of relativistic radio jets in asymmetric environments
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• Cosmic evolution of radio-AGN feedback: confronting models with data
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• RAiSE: simulation-based analytical model of AGN jets and lobes
• A Moderate Cooling Flow Phase at Galaxy Formation
• Radio Galaxy Zoo: Observational evidence for environment as the cause of radio source asymmetry
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• Correlation of Black Hole-Bulge Masses by AGN Jets
• Star-Formation in the Ultraluminous Infrared Galaxy F00183-7111
• RAiSE X: searching for radio galaxies in X-ray surveys
• CosmoDRAGoN simulations -- I. Dynamics and observable signatures of radio jets in cosmological environments
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• Core prominence as a signature of restarted jet activity in the LOFAR radio-galaxy population
• Quantifying Radio Source Morphology