Rising jet-inflated bubbles in clusters of galaxies

Assaf Sternberg*, Noam Soker

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

33 Scopus citations

Abstract

We conduct two-dimensional axisymmetric (referred to as 2.5D) hydrodynamical numerical simulations of bubble evolution in clusters of galaxies. We inflate bubbles using slow, massive jets with a wide opening angle, and follow their evolution as they rise through the intracluster medium. We find that these jet-inflated bubbles are quite stable, and can reach large distances in the cluster while maintaining their basic structure. The stability of the jet-inflated bubble comes mainly from the dense shell that forms around it during its inflation stage, and from the outward momentum of the bubble and shell. On the contrary, bubbles that are inserted by hand on to the grid and not inflated by a jet, i.e. an artificial bubble, lack these stabilizing factors; therefore, they are rapidly destroyed. The stability of the jet-inflated bubble removes the demand for stabilizing magnetic fields in the bubble.

Original languageEnglish
Pages (from-to)L13-L17
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume389
Issue number1
DOIs
StatePublished - Sep 2008
Externally publishedYes

Keywords

  • Cooling flows
  • Galaxies: clusters: general
  • Galaxies: jets

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