Magnetic inhibition of the recollimation instability in relativistic jets

Jin Matsumoto, Serguei S. Komissarov, Konstantinos N. Gourgouliatos

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this paper, we describe the results of three-dimensional relativistic magnetohydrodynamic simulations aimed at probing the role of regular magnetic field on the development of the instability that accompanies recollimation of relativistic jets. In particular, we studied the recollimation driven by the reconfinement of jets from active galactic nuclei (AGN) by the thermal pressure of galactic coronas. We find that a relatively weak azimuthal magnetic field can completely suppress the recollimation instability in such jets, with the critical magnetization parameter σcr < 0.01. We argue that the recollimation instability is a variant of the centrifugal instability (CFI) and show that our results are consistent with the predictions based on the study of magnetic CFI in rotating fluids. The results are discussed in the context of AGN jets in general and the nature of the Fanaroff-Riley morphological division of extragalactic radio sources in particular.

Original languageEnglish
Pages (from-to)4918-4929
Number of pages12
JournalMonthly Notices of the Royal Astronomical Society
Volume503
Issue number4
DOIs
Publication statusPublished - 2021 May 1
Externally publishedYes

Keywords

  • galaxies: jets
  • instabilities
  • methods: numerical
  • relativistic processes
  • shock waves

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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