Clusters’ far-reaching influence on narrow-angle tail radio galaxies

de Vos, K.; Hatch, N. A.; Merrifield, M. R. and Mingo, B. (2021). Clusters’ far-reaching influence on narrow-angle tail radio galaxies. Monthly Notices of the Royal Astronomical Society: Letters, 506(1) L55-L58.

DOI: https://doi.org/10.1093/mnrasl/slab075

Abstract

In order to study the ram-pressure interaction between radio galaxies and the intracluster medium, we analyse a sample of 208 highly-bent narrow-angle tail radio sources (NATs) in clusters, detected by the LOFAR Two-metre Sky Survey. For NATs within 7 R500 of the cluster centre, we find that their tails are distributed anisotropically with a strong tendency to be bent radially away from the cluster, which suggests that they are predominantly on radially inbound orbits. Within 0.5 R500, we also observe an excess of NATs with their jets bent towards the cluster core, indicating that these outbound sources fade away soon after passing pericentre. For the subset of NATs with spectroscopic redshifts, we find the radial bias in the jet angles exists even out to 10 R500, far beyond the virial radius. The presence of NATs at such large radii implies that significant deceleration of the accompanying inflowing intergalactic medium must be occurring there to create the ram pressure that bends the jets, and potentially even triggers the radio source.

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About

  • Item ORO ID
  • 78195
  • Item Type
  • Journal Item
  • ISSN
  • 1745-3933
  • Project Funding Details
  • Funded Project NameProject IDFunding Body
    Jet energy injection in galaxy groups and clusters - transfer of CG funding (Transfer in)ST/R00109X/1STFC (Science & Technology Facilities Council)
    Jet physics and impact via LOFAR extragalactic surveysST/R000794/1STFC (Science & Technology Facilities Council)
    Not SetST/T000295/1STFC (Science & Technology Facilities Council)
  • Keywords
  • galaxies: clusters: intracluster medium – galaxies: jets – galaxies: kinematics and dynamics
  • Academic Unit or School
  • Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
    Faculty of Science, Technology, Engineering and Mathematics (STEM)
  • Copyright Holders
  • © 2021 The Authors
  • SWORD Depositor
  • Jisc Publications-Router
  • Depositing User
  • Jisc Publications-Router

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