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A Possible Shock Wave in the Intergalactic Medium of the Cluster of Galaxies A754 | | R. Krivonos
; A. Vikhlinin
; M. Markevitch
; M. Pavlinsky
; | | Date: |
4 Jul 2003 | | Journal: | Astron.Lett. 29 (2003) 425-428 | | Subject: | astro-ph | | Abstract: | The cluster of galaxies A754 undergoes a merger of several large structural units. X-ray observations show a nonequilibrium state of the central part of the cluster, in which a cloud of cold plasma 500 kpc in size was identified amid the hotter cluster gas. The X-ray image of A754 exhibits a brightness discontinuity, which can be interpreted as a shock wave in front of a moving cloud of dense gas. The shock parameters are determined from the jump in intergalactic gas density using the ROSAT image. The estimated Mach number is M=1.71^{+0.45}_{-0.24} at a 68% confidence level. | | Source: | arXiv, astro-ph/0307090 | | Services: | Forum | Review | PDF | Favorites | |
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