Galaxy formation and evolution

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Stellar velocity profiles and line strengths out to four effective radii in the early-type galaxies NGC 3379 and NGC 821

(2009)

Authors:

A Weijmans, M Cappellari, R Bacon, PT de Zeeuw, E Emsellem, J Falcon-Barroso, H Kuntschner, RM McDermid, RCE van den Bosch, G van de Ven
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The Science Case for PILOT II: the Distant Universe

(2009)

Authors:

JS Lawrence, MCB Ashley, A Bunker, R Bouwens, D Burgarella, MG Burton, N Gehrels, K Glazebrook, K Pimbblet, R Quimby, W Saunders, JWV Storey, JC Wheeler
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The Science Case for PILOT I: Summary and Overview

(2009)

Authors:

JS Lawrence, MCB Ashley, J Bailey, D Barrado Y Navascues, T Bedding, J Bland-Hawthorn, I Bond, F Boulanger, R Bouwens, H Bruntt, A Bunker, D Burgarella, MG Burton, M Busso, D Coward, M-R Cioni, G Durand, C Eiroa, N Epchtein, N Gehrels, P Gillingham, K Glazebrook, R Haynes, L Kiss, PO Lagage, T Le Bertre, C Mackay, JP Maillard, A McGrath, V Minier, A Mora, K Olsen, P Persi, K Pimbblet, R Quimby, W Saunders, B Schmidt, D Stello, JWV Storey, C Tinney, P Tremblin, JC Wheeler, P Yoc
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Influence of AGN jets on the magnetized ICM

(2009)

Authors:

Y Dubois, J Devriendt, A Slyz, J Silk
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Influence of AGN jets on the magnetized ICM

ArXiv 0905.3345 (2009)

Authors:

Y Dubois, J Devriendt, A Slyz, J Silk

Abstract:

Galaxy clusters are the largest structures for which there is observational evidence of a magnetised medium. Central cores seem to host strong magnetic fields ranging from a few 0.1 microG up to several 10 microG in cooling flow clusters. Numerous clusters harbor central powerful AGN which are thought to prevent cooling flows in some clusters. The influence of such feedback on the magnetic field remains unclear: does the AGN-induced turbulence compensate the loss of magnetic amplification within a cool core? And how is this turbulence sustained over several Gyr? Using high resolution magneto-hydrodynamical simulations of the self-regulation of a radiative cooling cluster, we study for the first time the evolution of the magnetic field within the central core in the presence of a powerful AGN jet. It appears that the jet-induced turbulence strongly amplifies the magnetic amplitude in the core beyond the degree to which it would be amplified by pure compression in the gravitational field of the cluster. The AGN produces a non-cooling core and increases the magnetic field amplitude in good agreement with microG field observations.
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