Stripped interstellar gas in cluster cooling flows

Noam Soker*, Joel N. Bregman, Craig L. Sarazin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We suggest that nonlinear perturbations which lead to thermal instabilities in cooling flows might start as blobs of interstellar gas which are stripped out of cluster galaxies. Assuming that most of the gas produced by stellar mass loss in cluster galaxies is stripped from the galaxies, the total rate of such stripping is roughly ṀISM ∼ 100 M yr-1, which is similar to the rates of cooling in cluster cooling flows. It is possible that a substantial portion of the cooling gas originates as blobs of interstellar gas stripped from galaxies. The magnetic fields within and outside of the low-entropy perturbations may help to maintain their identities by suppressing both thermal conduction and Kelvin-Helmholtz instabilities. These density fluctuations may disrupt the propagation of radio jets through the intracluster gas, which may be one mechanism for producing wide-angle-tail radio galaxies.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalAstrophysical Journal
Issue number2
StatePublished - 20 Feb 1991


  • Galaxies: clustering
  • Galaxies: interactions
  • Galaxies: interstellar matter

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