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Triggering active galactic nuclei in galaxy clusters

Marshall, Madeline A; Shabala, Stanislav S; Krause, Martin G H; Pimbblet, Kevin A; Croton, Darren J; Owers, Matt S

Authors

Madeline A Marshall

Stanislav S Shabala

Martin G H Krause

Darren J Croton

Matt S Owers



Abstract

© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We model the triggering of active galactic nuclei (AGN) in galaxy clusters using the semianalytic galaxy formation model SAGE. We prescribe triggering methods based on the ram pressure galaxies experience as they move throughout the intracluster medium, which is hypothesized to trigger star formation and AGN activity. The clustercentric radius and velocity distribution of the simulated active galaxies produced by thesemodels are compared with those of AGN and galaxies with intense star formation from a sample of low-redshift relaxed clusters from the Sloan Digital Sky Survey. The ram pressure triggering model that best explains the clustercentric radius and velocity distribution of these observed galaxies has AGN and star formation triggered if 2.5 × 10 -14 Pa < P ram < 2.5 × 10 -13 Pa and P ram > 2P internal ; this is consistent with expectations from hydrodynamical simulations of ram-pressure-induced star formation. Our results show that ram pressure is likely to be an important mechanism for triggering star formation and AGN activity in clusters.

Journal Article Type Article
Publication Date Mar 1, 2018
Journal Monthly notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press (OUP)
Peer Reviewed Peer Reviewed
Volume 474
Issue 3
Pages 3615-3628
APA6 Citation Marshall, M. A., Shabala, S. S., Krause, M. G. H., Pimbblet, K. A., Croton, D. J., & Owers, M. S. (2018). Triggering active galactic nuclei in galaxy clusters. Monthly notices, containing papers, abstracts of papers, and reports of the proceedings of the Society, 474(3), 3615-3628. https://doi.org/10.1093/mnras/stx2996
DOI https://doi.org/10.1093/mnras/stx2996
Keywords Galaxies: active; Galaxies: clusters: general; Galaxies: evolution; Galaxies: formation
Publisher URL https://academic.oup.com/mnras/article/474/3/3615/4655052
Related Public URLs http://researchprofiles.herts.ac.uk/portal/en/publications/triggering-active-galactic-nuclei-in-galaxy-clusters(9c008ccd-ccc2-4b33-9658-244685edf866).html
Copyright Statement This article has been accepted for publication in MNRAS ©: 2018 The authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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Copyright Statement
This article has been accepted for publication in MNRAS ©: 2018 The authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.



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