Published May 24, 2024
| Version v1
Journal article
CHEX-MATE: A LOFAR pilot X-ray – radio study on five radio halo clusters
Creators
- Balboni, M.
- Gastaldello, F.
- Bonafede, A.
- Botteon, A.
- Bartalucci, I.
- Bourdin, H.
- Brunetti, G.
- Cassano, R.
- de Grandi, S.
- de Luca, F.
- Ettori, S.
- Ghizzardi, S.
- Gitti, M.
- Iqbal, A.
- Johnston-Hollitt, M.
- Lovisari, L.
- Mazzotta, P.
- Molendi, S.
- Pointecouteau, E.
- Pratt, G.
- Riva, G.
- Rossetti, M.
- Rottgering, H.
- Sereno, M.
- van Weeren, R.
- Venturi, T.
- Veronesi, I.
Contributors
Others:
- Laboratorio Nazionale TASC (TASC) ; National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)-INFM
- Jacobs University = Constructor University [Bremen]
- Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
- Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS)
- Universität für Bodenkultur Wien = University of Natural Resources and Life Sciences [Vienne, Autriche] (BOKU)
- Università della Calabria [Arcavacata di Rende, Italia] = University of Calabria [Italy] = Université de Calabre [Italie] (UniCal)
- Istituto di Radioastronomia [Bologna] (IRA) ; Istituto Nazionale di Astrofisica (INAF)
- INAF - Osservatorio Astronomico di Brera (OAB) ; Istituto Nazionale di Astrofisica (INAF)
- Institute for Plant Protection ; National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN, Sezione di Bologna) ; Istituto Nazionale di Fisica Nucleare (INFN)
- INAF - Osservatorio Astronomico di Bologna (OABO) ; Istituto Nazionale di Astrofisica (INAF)
- Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano (IASF-MI) ; Istituto Nazionale di Astrofisica (INAF)
- Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- Victoria University of Wellington
- Harvard-Smithsonian Center for Astrophysics (CfA) ; Harvard University-Smithsonian Institution
- Università degli Studi di Roma Tor Vergata [Roma, Italia] = University of Rome Tor Vergata [Rome, Italy] = Université de Rome Tor Vergata [Rome, Italie]
- Institut de recherche en astrophysique et planétologie (IRAP) ; Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)
- Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU) ; Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
- Université Paris Diderot - Paris 7 (UPD7)
Description
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such a connection has only been done for integrated quantities (e.g. L X − P radio relation). In recent years, new-generation radio telescopes have enabled the unprecedented possibility to study the non-thermal properties of galaxy clusters on a spatially resolved basis. In this work, we performed a pilot study to investigate the mentioned properties on five targets by combining X-ray data from the CHEX-MATE project with the second data release from the LOFAR Two meter Sky survey. We find a strong correlation ( r s ∼ 0.7) with a slope less than unity between the radio and X-ray surface brightness. We also report differences in the spatially resolved properties of the radio emission in clusters that show different levels of dynamical disturbance. In particular, less perturbed clusters (according to X-ray parameters) show peaked radio profiles in the centre, with a flattening in the outer regions, while the three dynamically disturbed clusters have steeper profiles in the outer regions. We fitted a model to the radio emission in the context of turbulent re-acceleration with a constant ratio between thermal and non-thermal particles' energy densities and a magnetic field profile linked to the thermal gas density as B ( r ) ∝ n th 0.5 . We found that this simple model cannot reproduce the behaviour of the observed radio emission.
Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.science/hal-04919205
- URN
- urn:oai:HAL:hal-04919205v1
Origin repository
- Origin repository
- UNICA