1. CLUSTERS OF GALAXIES Cluster Mergers and Cold Fronts

4. Show 2dF Movie

5. Structure Formation

6. Cluster Formation

7. Gas Dark Matter X-ray Temp

8. We discuss some of the physical processes that occurs during cluster merger

12. V

14. Cluster Mergers

16. Cluster Merger Density Entropy

20. 1E0657 Markevitch et al 2001.

21. 1E0657

22. Cold Fronts In Merger Clusters

23. CHANDRA OBSERVATION OF A2142 M. Markevitch et al. 2000, ApJ, 541, 542

24. CHANDRA OBSERVATION OF A3667 A. Vikhlinin, M. Markevitch, S. S. Murray 2000, ApJ, 551, 160

25. The most natural explanation is that A3667 hosts a moving dense, cold gas cloud Interpretation for the Cold Front The ratio between the pressure in region 0 and 1 gives the cloud speed The cold front is the contact surface The external gas slows down at leading edge but reaccelerates as it is squeezed to the sides