A cluster merger and the origin of the extended radio emission in Abell 3667

Kurt Roettiger, Jack O. Burns, James McLellan Stone

Research output: Contribution to journalArticle

143 Scopus citations

Abstract

We present a numerical model for the extended steep-spectrum radio sources and the elongated X-ray structure in A3667 based on new three-dimensional MHD/N-body simulations. The X-ray and optical analyses of A3667 indicate that it has undergone a recent subcluster merger event. We believe that the Mpc-scale radio sources identified in A3667 are also a consequence of the merger. Our previous numerical simulations show that mergers often produce large-scale shocks and turbulence capable of both magnetic field amplification and in situ reacceleration of relativistic particles. Our model suggests that these radio structures, separated by ∼2.6 h-1100 Mpc, are in fact causally linked via a slightly off-axis merger that occurred nearly in the plane of the sky approximately 1 Gyr ago with a subcluster having a total mass equal to ~20% of the primary cluster.

Original languageEnglish (US)
Pages (from-to)603-612
Number of pages10
JournalAstrophysical Journal
Volume518
Issue number2 PART 1
DOIs
StatePublished - Jun 20 1999

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxies: clusters: individual (Abell 3667)
  • Intergalactic medium
  • MHD
  • Methods: numerical
  • X-rays: galaxies

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