English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Enhancing AGN efficiency and cool-core formation with anisotropic thermal conduction

Barnes, D. J., Kannan, R., Vogelsberger, M., Pfrommer, C., Puchwein, E., Weinberger, R., et al. (2019). Enhancing AGN efficiency and cool-core formation with anisotropic thermal conduction. Monthly Notices of the Royal Astronomical Society, 488, 3003-3013.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-D1E4-D Version Permalink: http://hdl.handle.net/21.11116/0000-0005-D1E5-C
Genre: Journal Article

Files

show Files

Locators

show
hide
Description:
-

Creators

show
hide
 Creators:
Barnes, David J.1, Author
Kannan, Rahul1, Author
Vogelsberger, Mark1, Author
Pfrommer, Christoph1, Author
Puchwein, Ewald1, Author
Weinberger, Rainer1, Author
Springel, Volker1, Author
Pakmor, Rüdiger1, Author
Nelson, Dylan1, Author
Marinacci, Federico1, Author
Pillepich, Annalisa1, Author
Torrey, Paul1, Author
Hernquist, Lars1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

Content

show
hide
Free keywords: conduction methods: numerical galaxies: clusters: general galaxies: clusters: intracluster medium Astrophysics - Astrophysics of Galaxies
 Abstract: Understanding how baryonic processes shape the intracluster medium (ICM) is of critical importance to the next generation of galaxy cluster surveys. However, many models of structure formation neglect potentially important physical processes, like anisotropic thermal conduction (ATC). We explore the impact of ATC on the prevalence of cool-cores (CCs) via 12 pairs of magnetohydrodynamical galaxy cluster simulations, using the IllustrisTNG model with and without ATC. Examining their properties we find that the addition of ATC has a negligible impact on the median rotation measure, plasma β, the magnetic field-radial direction angle, and the effective Spitzer value. However, the scatter in the angle and effective Spitzer value is 50 per cent larger with ATC because the magnetic field aligns with the azimuthal direction to a greater extent in relaxed clusters. ATC's impact varies from cluster to cluster and with CC criterion, but its inclusion produces a systematic shift to larger CC fractions at z = 0 for all CC criteria considered. Additionally, the inclusion of ATC flattens the CC fraction redshift evolution, helping to ease the tension with the observed evolution. With ATC, the energy required for the central black hole to self-regulate is reduced by 24 per cent and the gas fraction at 0.01 r_{500} increases by 100 per cent, producing larger CC fractions. ATC makes the ICM unstable to perturbations and the increased efficiency of AGN feedback suggests that its inclusion results in a greater level of mixing in the ICM, demonstrated by the 10 per cent reduction in central metallicity for clusters with ATC.

Details

show
hide
Language(s):
 Dates: 2019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 488 Sequence Number: - Start / End Page: 3003 - 3013 Identifier: -