English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Recent X-ray observations of galaxy clusters suggest that cluster populationsare bimodally distributed according to central gas entropy and are separatedinto two distinct classes: cool core (CC) and non-cool core (NCC) clusters.While it is widely accepted that AGN feedback plays a key role in offsettingradiative losses and maintaining many clusters in the CC state, the origin ofNCC clusters is much less clear. At the same time, a handful of extremelypowerful AGN outbursts have recently been detected in clusters, with a totalenergy ~10^{61}-10^{62} erg. Using two dimensional hydrodynamic simulations, weshow that if a large fraction of this energy is deposited near the centers ofCC clusters, which is likely common due to dense cores, these AGN outbursts cancompletely remove CCs, transforming them to NCC clusters. Our model also hasinteresting implications for cluster abundance profiles, which usually show acentral peak in CC systems. Our calculations indicate that during the CC to NCCtransformation, AGN outbursts efficiently mix metals in cluster centralregions, and may even remove central abundance peaks if they are not broadenough. For CC clusters with broad central abundance peaks, AGN outburstsdecrease peak abundances, but can not effectively destroy the peaks. Our modelmay simultaneously explain the contradictory (possibly bimodal) results ofabundance profiles in NCC clusters, some of which are nearly flat, while othershave strong central peaks similar to those in CC clusters. A statisticalanalysis of the sizes of central abundance peaks and their redshift evolutionmay shed interesting insights on the origin of both types of NCC clusters andthe evolution history of thermodynamics and AGN activity in clusters.

Removing Cool Cores and Central Metallicity Peaks in Galaxy Clusters with Powerful AGN Outbursts