Beyond MHD in galaxy clusters

I. J. Parrish; E. Quataert; P. Sharma

doi:10.1063/1.3293076

Beyond MHD in galaxy clusters

I. J. Parrish, E. Quataert, P. Sharma

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We demonstrate that the intracluster medium (ICM) of clusters of galaxies is everywhere convectively unstable to one of two instabilities driven by anisotropic thermal conduction along magnetic field lines, despite having stably stratified entropy gradients. Outside any cooling core, the magnetothermal instability (MTI) reorients magnetic fields to be largely radial, enhancing the effective radial thermal conductivity. In galaxy clusters with a cooling core, the heat-flux-driven buoyancy instability (HBI) has the opposite effect. By reducing the effective radial thermal conductivity, the HBI can hasten the onset of a cooling catastrophe for low central entropy clusters.

Original language	English (US)
Title of host publication	Monster's Fiery Breath
Subtitle of host publication	Feedback in Galaxies, Groups, and Clusters - Proceedings of the International Conference
Pages	358-362
Number of pages	5
DOIs	https://doi.org/10.1063/1.3293076
State	Published - 2009
Externally published	Yes
Event	International Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters - Madison, WI, United States Duration: Jun 1 2009 → Jun 5 2009

Publication series

Name	AIP Conference Proceedings
Volume	1201
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	International Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters
Country/Territory	United States
City	Madison, WI
Period	6/1/09 → 6/5/09

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Keywords

Clusters
Cooling-flows

Access to Document

10.1063/1.3293076

Cite this

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title = "Beyond MHD in galaxy clusters",

abstract = "We demonstrate that the intracluster medium (ICM) of clusters of galaxies is everywhere convectively unstable to one of two instabilities driven by anisotropic thermal conduction along magnetic field lines, despite having stably stratified entropy gradients. Outside any cooling core, the magnetothermal instability (MTI) reorients magnetic fields to be largely radial, enhancing the effective radial thermal conductivity. In galaxy clusters with a cooling core, the heat-flux-driven buoyancy instability (HBI) has the opposite effect. By reducing the effective radial thermal conductivity, the HBI can hasten the onset of a cooling catastrophe for low central entropy clusters.",

keywords = "Clusters, Cooling-flows",

author = "Parrish, {I. J.} and E. Quataert and P. Sharma",

year = "2009",

doi = "10.1063/1.3293076",

language = "English (US)",

isbn = "9780735407381",

series = "AIP Conference Proceedings",

pages = "358--362",

booktitle = "Monster's Fiery Breath",

note = "International Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters ; Conference date: 01-06-2009 Through 05-06-2009",

}

Parrish, IJ, Quataert, E & Sharma, P 2009, Beyond MHD in galaxy clusters. in Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters - Proceedings of the International Conference. AIP Conference Proceedings, vol. 1201, pp. 358-362, International Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters, Madison, WI, United States, 6/1/09. https://doi.org/10.1063/1.3293076

TY - GEN

T1 - Beyond MHD in galaxy clusters

AU - Parrish, I. J.

AU - Quataert, E.

AU - Sharma, P.

PY - 2009

Y1 - 2009

N2 - We demonstrate that the intracluster medium (ICM) of clusters of galaxies is everywhere convectively unstable to one of two instabilities driven by anisotropic thermal conduction along magnetic field lines, despite having stably stratified entropy gradients. Outside any cooling core, the magnetothermal instability (MTI) reorients magnetic fields to be largely radial, enhancing the effective radial thermal conductivity. In galaxy clusters with a cooling core, the heat-flux-driven buoyancy instability (HBI) has the opposite effect. By reducing the effective radial thermal conductivity, the HBI can hasten the onset of a cooling catastrophe for low central entropy clusters.

AB - We demonstrate that the intracluster medium (ICM) of clusters of galaxies is everywhere convectively unstable to one of two instabilities driven by anisotropic thermal conduction along magnetic field lines, despite having stably stratified entropy gradients. Outside any cooling core, the magnetothermal instability (MTI) reorients magnetic fields to be largely radial, enhancing the effective radial thermal conductivity. In galaxy clusters with a cooling core, the heat-flux-driven buoyancy instability (HBI) has the opposite effect. By reducing the effective radial thermal conductivity, the HBI can hasten the onset of a cooling catastrophe for low central entropy clusters.

KW - Clusters

KW - Cooling-flows

UR - http://www.scopus.com/inward/record.url?scp=77955316838&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955316838&partnerID=8YFLogxK

U2 - 10.1063/1.3293076

DO - 10.1063/1.3293076

M3 - Conference contribution

AN - SCOPUS:77955316838

SN - 9780735407381

T3 - AIP Conference Proceedings

SP - 358

EP - 362

BT - Monster's Fiery Breath

T2 - International Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters

Y2 - 1 June 2009 through 5 June 2009

ER -

Beyond MHD in galaxy clusters

Abstract

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All Science Journal Classification (ASJC) codes

Keywords

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