Triggering Active Galactic Nuclei in galaxy clusters

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

doi:10.1093/mnras/stx2996

Triggering Active Galactic Nuclei in galaxy clusters

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

Centre for Astrophysics Research (CAR)

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English
Article number	stx2996
Pages (from-to)	3615-3628
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	474
Issue number	3
Early online date	23 Nov 2017
DOIs	https://doi.org/10.1093/mnras/stx2996
Publication status	Published - 1 Mar 2018

Keywords

Galaxies: active
Galaxies: clusters: general
Galaxies: evolution
Galaxies: formation

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title = "Triggering Active Galactic Nuclei in galaxy clusters",

abstract = "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. ",

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AU - Krause, Martin G. H.

AU - Pimbblet, Kevin A.

AU - Croton, Darren J.

AU - Owers, Matt S.

N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - 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.

AB - 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.

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KW - Galaxies: formation

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Triggering Active Galactic Nuclei in galaxy clusters

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