Cold fronts and shocks formed by gas streams in galaxy clusters

E. Zinger*, A. Dekel, Y. Birnboim, D. Nagai, E. Lau, A. V. Kravtsov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Cold fronts (CFs) and shocks are hallmarks of the complex intra-cluster medium (ICM) in galaxy clusters. They are thought to occur due to gas motions within the ICM and are often attributed to galaxy mergers within the cluster. Using hydro-cosmological simulations of clusters of galaxies, we show that collisions of inflowing gas streams, seen to penetrate to the very centre of about half the clusters, offer an additional mechanism for the formation of shocks and CFs in cluster cores. Unlike episodic merger events, a gas stream inflow persists over a period of several Gyr and it could generate a particular pattern of multiple CFs and shocks.

Original languageAmerican English
Pages (from-to)56-70
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
StatePublished - 1 May 2018

Bibliographical note

Funding Information:
We thank Neta Zinger for his assistance and advice. We thank the anonymous referee for comments and advice which improved the paper. This work was partly supported by the grants ISF 124/12, I-CORE Programme of the PBC/ISF 1829/12, BSF 2014-273, and NSF AST-1405962 and AST-1412768.

Publisher Copyright:
© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.


  • Galaxies: clusters: general
  • Galaxies: clusters: intracluster medium


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