From outskirts to core: the suppression and activation of radio AGN around galaxy clusters

de Vos, K.; Hatch, N. A.; Merrifield, M. R.

Abstract

To investigate how the radio-identified active galactic nuclei (AGN) fraction varies with cluster-centric radius, we present the projected and de-projected distributions of a large sample of Low-Frequency Array-identified radio AGN out to around galaxy clusters. The AGN fraction experiences a increase above the field fraction in the cluster outskirts at around, a decrease around, and an increase of over three times the field fraction value in the very cluster core. We label these three radial windows the outer, intermediate, and inner regions respectively, and investigate how these radial trends might arise due to intrinsic properties of the AGN population. The only difference seen in host galaxy stellar mass is in the inner region, where there is a much higher fraction of massive host galaxies. Analysing AGN radio luminosity, regions with a higher AGN fraction tend to have more radio luminous AGN, and vice versa. We discuss the physical mechanisms that might be responsible for these results with reference to the literature.

Citation

de Vos, K., Hatch, N. A., & Merrifield, M. R. (2024). From outskirts to core: the suppression and activation of radio AGN around galaxy clusters. Monthly Notices of the Royal Astronomical Society, 535(1), 217–222. https://doi.org/10.1093/mnras/stae2391

• Journal Article Type: Article
• Acceptance Date: Oct 16, 2024
• Online Publication Date: Oct 18, 2024
• Publication Date: 2024-11
• Deposit Date: Oct 19, 2024
• Publicly Available Date: Oct 21, 2024
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 535
• Issue: 1
• Pages: 217–222
• DOI: https://doi.org/10.1093/mnras/stae2391
• Keywords: surveys, galaxies: active, galaxies: clusters: general, galaxies: evolution
• Public URL: https://nottingham-repository.worktribe.com/output/40706197
• Publisher URL: https://academic.oup.com/mnras/article/535/1/217/7826779