Chandra Observation of Abell 2142: Survival of Dense Subcluster Cores in a Merger

  title={Chandra Observation of Abell 2142: Survival of Dense Subcluster Cores in a Merger},
  author={Maxim Markevitch and Trevor J. Ponman and Paul E. J. Nulsen and Marshall W. Bautz and Daren J. Burke and Laurence P. David and Dustin Davis and R. Hank Donnelly and William R. Forman and C. Jones and Jelle S. Kaastra and Edwin Manville Kellogg and D.-W. Kim and Jeffrey K. Kolodziejczak and Pasquale Mazzotta and Andrea Pagliaro and S. K. Patel and Leon P. Van Speybroeck and Alexey Vikhlinin and Jan M. Vrtilek and M. W. Wise and Ping Zhao},
  journal={The Astrophysical Journal},
  pages={542 - 549}
We use Chandra data to map the gas temperature in the central region of the merging cluster A2142. The cluster is markedly nonisothermal; it appears that the central cooling flow has been disturbed but not destroyed by a merger. The X-ray image exhibits two sharp, bow-shaped, shocklike surface brightness edges or gas density discontinuities. However, temperature and pressure profiles across these edges indicate that these are not shock fronts. The pressure is reasonably continuous across these… 

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