Heating the intracluster medium by jet-inflated bubbles

Shlomi Hillel*, Noam Soker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

We examine the heating of the intracluster medium (ICM) of cooling flow clusters of galaxies by jet-inflated bubbles and conclude that mixing of hot bubble gas with the ICM is more important than turbulent heating and shock heating. We use the PLUTO hydrodynamical code in full 3D to properly account for the inflation of the bubbles and to the multiple vortices induced by the jets and bubbles. The vortices mix some hot shocked jet gas with the ICM. For the parameters used by us the mixing process accounts for about four times as much heating as that by the kinetic energy in the ICM, namely, turbulence and sound waves. We conclude that turbulent heating plays a smaller role than mixing. Heating by shocks is even less efficient.

Original languageEnglish
Pages (from-to)2139-2148
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume455
Issue number2
DOIs
StatePublished - 2016
Externally publishedYes

Keywords

  • Galaxies: clusters: general
  • Galaxies: jets

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