The role of turbulence in AGN self-regulation in galaxy clusters

Evan Scannapieco, Marcus Brüggen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cool cores of galaxy clusters are thought to be heated by low-power active galactic nuclei (AGN), whose accretion is regulated by feedback. However, the interaction between the hot gas ejected by the AGN and the ambient intracluster medium is extremely difficult to simulate, as it involves a wide range of spatial scales and gas that is Rayleigh-Taylor (RT) unstable. Here we use a subgrid model for RT-driven turbulence to overcome these problems and present the first observationallyconsistent hydrodynamical simulations of AGN self-regulation in galaxy clusters. For a wide range of parameter choices the cluster in our three-dimensional simulations regulates itself for at least several 109 years. Heating balances cooling through a string of outbreaks with a typical recurrence time of ≈ 80 Myrs, a timescale that depends only on the global cluster properties.

Original languageEnglish (US)
Title of host publicationMonster's Fiery Breath
Subtitle of host publicationFeedback in Galaxies, Groups, and Clusters - Proceedings of the International Conference
Pages379-382
Number of pages4
DOIs
StatePublished - Dec 1 2009
EventInternational Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters - Madison, WI, United States
Duration: Jun 1 2009Jun 5 2009

Publication series

NameAIP Conference Proceedings
Volume1201
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters
CountryUnited States
CityMadison, WI
Period6/1/096/5/09

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Keywords

  • Active galactic nuclei
  • Galaxy clusters
  • Hydrodynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Scannapieco, E., & Brüggen, M. (2009). The role of turbulence in AGN self-regulation in galaxy clusters. In Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters - Proceedings of the International Conference (pp. 379-382). (AIP Conference Proceedings; Vol. 1201). https://doi.org/10.1063/1.3293080