AGN-driven turbulence in galaxy clusters

M. Brüggen, Evan Scannapieco

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

Abstract

Hot, underdense bubbles powered by active galactic nuclei (AGN) are likely to play a key role in halting catastrophic cooling in the centers of cool-core galaxy clusters. We present three-dimensional simulations that capture the evolution of such bubbles, using an adaptive-mesh hydrodynamic code, FLASH3, to which we have added a subgrid model of turbulence and mixing. Pure-hydro simulations indicate that AGN bubbles are disrupted into resolution-dependent pockets of underdense gas. However, proper modeling of subgrid turbulence shows that Rayleigh-Taylor instabilities act to mix the heated regions with their surroundings, while at the same time preserving them as coherent structures, consistent with observations. Thus bubbles are transformed into hot clouds of mixed material as they move outwards in the hydrostatic intracluster medium. Properly capturing the evolution of such clouds has important implications for many ICM properties.

Original languageEnglish (US)
Title of host publicationEAS Publications Series
Pages63-68
Number of pages6
Volume44
DOIs
StatePublished - 2010
EventJENAM 2008: Grand Challenges in Computational Astrophysics - Vienna, Austria
Duration: Sep 8 2008Sep 11 2008

Publication series

NameEAS Publications Series
Volume44
ISSN (Print)16334760
ISSN (Electronic)16381963

Other

OtherJENAM 2008: Grand Challenges in Computational Astrophysics
CountryAustria
CityVienna
Period9/8/089/11/08

Fingerprint

Galaxies
Turbulence
Hydrodynamics
Cooling
Gases

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Brüggen, M., & Scannapieco, E. (2010). AGN-driven turbulence in galaxy clusters. In EAS Publications Series (Vol. 44, pp. 63-68). (EAS Publications Series; Vol. 44). https://doi.org/10.1051/eas/1044011

AGN-driven turbulence in galaxy clusters. / Brüggen, M.; Scannapieco, Evan.

EAS Publications Series. Vol. 44 2010. p. 63-68 (EAS Publications Series; Vol. 44).

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

Brüggen, M & Scannapieco, E 2010, AGN-driven turbulence in galaxy clusters. in EAS Publications Series. vol. 44, EAS Publications Series, vol. 44, pp. 63-68, JENAM 2008: Grand Challenges in Computational Astrophysics, Vienna, Austria, 9/8/08. https://doi.org/10.1051/eas/1044011
Brüggen M, Scannapieco E. AGN-driven turbulence in galaxy clusters. In EAS Publications Series. Vol. 44. 2010. p. 63-68. (EAS Publications Series). https://doi.org/10.1051/eas/1044011
Brüggen, M. ; Scannapieco, Evan. / AGN-driven turbulence in galaxy clusters. EAS Publications Series. Vol. 44 2010. pp. 63-68 (EAS Publications Series).
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