Confinement and diffusion time-scales of CR hadrons in AGN-inflated bubbles
arXiv:1707.05211 · doi:10.1093/mnras/stx1404
Abstract
While rich clusters are powerful sources of X-rays, gamma-ray emission from these large cosmic structures has not been detected yet. X-ray radiative energy losses in the central regions of relaxed galaxy clusters are so strong that one needs to consider special sources of energy, likely AGN feedback, to suppress catastrophic cooling of the gas. We consider a model of AGN feedback that postulates that the AGN supplies the energy to the gas by inflating bubbles of relativistic plasma, whose energy content is dominated by cosmic-ray (CR) hadrons. If most of these hadrons can quickly escape the bubbles, then collisions of CRs with thermal protons in the intracluster medium (ICM) should lead to strong gamma-ray emission, unless fast diffusion of CRs removes them from the cluster. Therefore, the lack of detections with modern gamma-ray telescopes sets limits on the confinement time of CR hadrons in bubbles and CR diffusive propagation in the ICM.
arXiv comment8 pages, 2 figures, accepted for publication in MNRAS
References in corpus (35)
- Observational Evidence of AGN Feedback
- Chandra sample of nearby relaxed galaxy clusters: mass, gas fraction, and mass-temperature relation
- Energy spectra of gamma-rays, electrons and neutrinos produced at proton-proton interactions in the very high energy regime
- A Systematic Study of Radio-Induced X-ray Cavities in Clusters, Groups, and Galaxies
- Evolution of Buoyant Bubbles in M87
- Chandra X-ray Observations of the Hydra A Cluster: An Interaction Between the Radio Source and the X-Ray-Emitting Gas
- X-ray Spectroscopy of Cooling Clusters
- XMM-Newton observations of the Perseus Cluster I: The temperature and surface brightness structure
- X-ray Spectroscopy of the Cluster of Galaxies Abell 1795 with XMM-Newton
- Cooling Flows as a Calorimeter of AGN Mechanical Power
- Constraining the population of cosmic ray protons in cooling flow clusters with gamma-ray and radio observations: Are radio mini-halos of hadronic origin?
- Fermi Discovery of Gamma-Ray Emission from NGC 1275
- Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
- Search for cosmic-ray induced gamma-ray emission in Galaxy Clusters
- Extreme AGN feedback in the Massive Cluster Survey (MACS): a detailed study of X-ray cavities at z > 0.3
- Is the gas in cooling-flows multi-phase?
- Cosmic Ray Streaming in Clusters of Galaxies
- Particle Energies and Filling Fractions of Radio Bubbles in Cluster Cores
- Constraints on Cosmic Rays, Magnetic Fields, and Dark Matter from Gamma-Ray Observations of the Coma Cluster of Galaxies with VERITAS and Fermi
- The duty cycle of radio-mode feedback in complete samples of clusters
- Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
- Detection of very-high energy γ-ray emission from NGC 1275 by the MAGIC telescopes
- Toward a comprehensive model for feedback by active galactic nuclei: new insights from M87 observations by LOFAR, Fermi and H.E.S.S
- The Denoised, Deconvolved, and Decomposed Fermi -ray sky - An application of the DPO algorithm
- Constraining Cosmic Rays and Magnetic Fields in the Perseus Galaxy Cluster with TeV observations by the MAGIC telescopes
- Probing the cosmic-ray content of galaxy clusters by stacking Fermi-LAT count maps
- Very high energy gamma-ray observations of the galaxy clusters Abell 496 and Abell 85 with H.E.S.S
- Deep observation of the NGC 1275 region with MAGIC: search of diffuse gamma-ray emission from cosmic rays in the Perseus cluster
- Unveiling the composition of radio plasma bubbles in galaxy clusters with the Sunyaev-Zel'dovich effect
- Counting gamma rays in the directions of galaxy clusters
- Resonant scattering in the Perseus Cluster: spectral model for constraining gas motions with Astro-H
- MAGIC observations of the giant radio galaxy M87 in a low-emission state between 2005 and 2007
- Structures and components in galaxy clusters: observations and models
- Stopping Cooling Flows with Cosmic Ray Feedback
- Comptonization of the cosmic microwave background by high energy particles residing in AGN cocoons
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- Hot Atmospheres, Cold Gas, AGN Feedback and the Evolution of Early Type Galaxies: a Topical Perspective
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- Recent Progress in Modeling the Macro- and Micro-Physics of Radio Jet Feedback in Galaxy Clusters
- Supermassive Black Hole Feedback
- Fast and "lossless" propagation of relativistic electrons along magnetized non-thermal filaments in galaxy clusters and the Galactic Center region