Triggering active galactic nuclei in galaxy clusters

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

^*Corresponding author for this work

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

24 Citations (Scopus)

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
Pages (from-to)	3615-3628
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	474
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stx2996
Publication status	Published - 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 < Pram < 2.5 × 10-13 Pa and Pram > 2Pinternal; 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.",

keywords = "galaxies: active, galaxies: clusters: general, galaxies: evolution, galaxies: formation",

author = "Marshall, {Madeline A.} and Shabala, {Stanislav S.} and Krause, {Martin G. H.} and Pimbblet, {Kevin A.} and Croton, {Darren J.} and Owers, {Matt S.}",

year = "2018",

month = mar,

doi = "10.1093/mnras/stx2996",

language = "English",

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T1 - Triggering active galactic nuclei in galaxy clusters

AU - Marshall, Madeline A.

AU - Shabala, Stanislav S.

AU - Krause, Martin G. H.

AU - Pimbblet, Kevin A.

AU - Croton, Darren J.

AU - Owers, Matt S.

PY - 2018/3

Y1 - 2018/3

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 < Pram < 2.5 × 10-13 Pa and Pram > 2Pinternal; 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 < Pram < 2.5 × 10-13 Pa and Pram > 2Pinternal; 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.

KW - galaxies: active

KW - galaxies: clusters: general

KW - galaxies: evolution

KW - galaxies: formation

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Triggering active galactic nuclei in galaxy clusters

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Keywords

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