Waking the monster: the onset of AGN feedback in galaxy clusters hosting young central radio galaxies

Abstract

The investigation of the feedback cycle in galaxy clusters has historically been performed for systems where feedback is ongoing ("mature-feedback" clusters), that is where the central radio galaxy has inflated radio lobes, pushing aside the intracluster medium (ICM). In this pilot study we present results from "pre-feedback" clusters, where the central newly active radio galaxies (age $<10^3$ yr) may not yet have had time to alter the thermodynamic state of the ICM. We analyze $Chandra$ and MUSE observations of two such systems, evaluating the hot gas entropy and cooling time profiles, and characterizing the morphology and kinematics of the warm gas. Based on our exploratory study of these two sources, we find that the hot gas meets the expectations for an as-yet unheated ICM. Specifically, the entropy and cooling time of pre-feedback clusters within 20 kpc from the center fall below those of mature-feedback clusters by a factor $\sim$2. We speculate that with an estimated mechanical power of $\sim 10^{44}-10^{45}$ erg s${}^{-1}$, the two young radio galaxies may restore the entropy levels in a few tens of Myr, which are typical values of power outbursts and lifetimes for radio galaxies in clusters. Conversely, the properties of the gas at $\sim 10^4$ K seem to remain invariant between the two feedback stages, possibly suggesting that the warm gas reservoir accumulates over long periods ($10^7$ - $10^8$ yr) during the growth of the radio galaxy. We conclude that the exploratory results obtained from our analysis of two cluster-central young radio galaxies are crucial in the context of understanding the onset of active galactic nuclei feedback, and they provide enough motivation for further investigation of similar cases.

arXiv comment8 pages, 3 figures. Accepted for publication in A&A

References in corpus (42)

• A Systematic Study of Radio-Induced X-ray Cavities in Clusters, Groups, and Galaxies
• The Feedback-Regulated Growth of Black Holes and Bulges through Gas Accretion and Starbursts in Cluster Central Dominant Galaxies
• Intracluster Medium Entropy Profiles for a Chandra Archival Sample of Galaxy Clusters
• Magnetic Field in Clusters of Galaxies
• Cause and Effect of Feedback: Multiphase Gas in Cluster Cores Heated by AGN Jets
• The third realization of the International Celestial Reference Frame by very long baseline interferometry
• The Regulation of Cooling and Star Formation in Luminous Galaxies by AGN Feedback and the Cooling-Time/Entropy Threshold for the Onset of Star Formation
• Compact steep-spectrum and peaked-spectrum radio sources
• The Cool-Core Bias in X-ray Galaxy Cluster Samples I: Method And Application To HIFLUGCS
• Cooling, AGN Feedback and Star Formation in Simulated Cool-Core Galaxy Clusters
• The Dance of Heating and Cooling in Galaxy Clusters: 3D Simulations of Self-Regulated AGN Outflows
• AGN heating and ICM cooling in the HIFLUGCS sample of galaxy clusters
• Shaken Snow Globes: Kinematic Tracers of the Multiphase Condensation Cascade in Massive Galaxies, Groups, and Clusters
• A Mechanism for Stimulating AGN Feedback by Lifting Gas in Massive Galaxies
• Ubiquitous cold and massive filaments in cool core clusters
• Heating the hot atmospheres of galaxy groups and clusters with cavities: the relationship between jet power and low-frequency radio emission
• Feedback from Active Galactic Nuclei in Galaxy Groups
• Formation of cold filaments in cooling flow clusters
• A Galaxy-Scale Fountain of Cold Molecular Gas Pumped by a Black Hole
• Relativistic jet feedback II: Relationship to gigahertz peak spectrum and compact steep spectrum radio galaxies
• A Comprehensive Study of the Radio Properties of Brightest Cluster Galaxies
• Scaling Properties of Galaxy Groups
• Galaxy cluster mass profiles
• Radio properties of Compact Steep Spectrum and GHz-Peaked Spectrum radio sources
• Feedback through multiple outbursts in the cluster 2A 0335+096
• Samples and statistics of CSS and GPS sources
• High Radio Frequency Properties and Variability of Brightest Cluster Galaxies
• Hot gaseous atmospheres in galaxy groups and clusters are both heated and cooled by X-ray cavities
• Radiative age mapping of the remnant radio galaxy B2 0924+30: the LOFAR perspective
• Gas condensation in Brightest Group Galaxies unveiled with MUSE
• Radio sources associated with Optical Galaxies and having Unresolved or Extended morphologies (ROGUE). I. A catalog of SDSS galaxies with FIRST core identifications
• GPS/CSS radio sources and their relation to other AGN
• On the Jet Production Efficiency in a Sample of the Youngest Radio Galaxies
• Probing multiphase gas in local massive elliptical galaxies via multiwavelength observations
• A Chandra study of Abell 795 -- a sloshing cluster with a FR0 radio galaxy at its center
• Environmental Dependence of Self-Regulating Black-hole Feedback in Massive Galaxies
• Energy Deposition Profiles and Entropy in Galaxy Clusters
• The VLT-MUSE and ALMA view of the MACS 1931.8-2635 brightest cluster galaxy
• AGN feedback and entropy injection in galaxy cluster cores
• Signatures of multiple episodes of AGN activity in the core of Abell 1795
• Massive Molecular Gas as a Fuel Tank for Active Galactic Nuclei Feedback in Central Cluster Galaxies
• The cluster-central compact steep-spectrum radio galaxy 1321+045

Cited by in corpus (5)

• The correlation between the 500 pc scale molecular gas masses and AGN powers for massive elliptical galaxies
• Chandra X-ray Observatory study of the X-ray emission of PKS 0023-26 and comparison with recent ALMA results
• The relationship between warm and hot gas-phase metallicity in massive elliptical galaxies and the influence of AGN feedback
• Direct observation of the X-ray counterpart of the Hα filaments and of the sloshing spiral in the Perseus galaxy cluster
• Investigating AGN feedback in H$\alpha$-luminous galaxy clusters: first Chandra X-ray analysis of Abell 2009