{
  "id": "2007.01306",
  "version": "v1",
  "published": "2020-07-02T18:00:01.000Z",
  "updated": "2020-07-02T18:00:01.000Z",
  "title": "On the relation between mini-halos and AGN feedback in clusters of galaxies",
  "authors": [
    "A. Richard-Laferrière",
    "J. Hlavacek-Larrondo",
    "R. S. Nemmen",
    "C. L. Rhea",
    "G. B. Taylor",
    "M. Prasow-Émond",
    "M. Gendron-Marsolais",
    "M. Latulippe",
    "A. C. Edge",
    "A. C. Fabian",
    "J. S. Sanders",
    "M. T. Hogan",
    "G. Demontigny"
  ],
  "comment": "26 pages, 9 figures, 8 tables, submitted to MNRAS",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE"
  ],
  "abstract": "A variety of large-scale diffuse radio structures have been identified in many clusters with the advent of new state-of-the-art facilities in radio astronomy. Among these diffuse radio structures, radio mini-halos are found in the central regions of cool core clusters. Their origin is still unknown and they are challenging to discover; less than thirty have been published to date. Based on new VLA observations, we confirmed the mini-halo in the massive strong cool core cluster PKS 0745$-$191 ($z=0.1028$) and discovered one in the massive cool core cluster MACS J1447.4+0827 ($z=0.3755$). Furthermore, using a detailed analysis of all known mini-halos, we explore the relation between mini-halos and AGN feedback processes from the central galaxy. We find evidence of strong, previously unknown correlations between mini-halo radio power and X-ray cavity power, and between mini-halo and the central galaxy radio power related to the relativistic jets when spectrally decomposing the AGN radio emission into a component for past outbursts and one for on-going accretion. Overall, our study indicates that mini-halos are directly connected to the central AGN in clusters, following previous suppositions. We hypothesize that AGN feedback may be one of the dominant mechanisms giving rise to mini-halos by injecting energy into the intra-cluster medium and reaccelerating an old population of particles, while sloshing motion may drive the overall shape of mini-halos inside cold fronts. AGN feedback may therefore not only play a vital role in offsetting cooling in cool core clusters, but may also play a fundamental role in re-energizing non-thermal particles in clusters.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-07-02T18:00:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "agn feedback",
      "cool core cluster macs",
      "diffuse radio structures",
      "galaxy radio power",
      "strong cool core cluster pks"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 26,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}