Journal
ASTROPHYSICAL JOURNAL
Volume 751, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/751/2/95
Keywords
galaxies: clusters: general; galaxies: interactions; X-rays: galaxies: clusters
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Funding
- NASA
- ASC/Alliance Center for Astrophysical Thermonuclear Flashes at the University of Chicago
- SAO
- CFD
- Chandra grant [GO8-9128X]
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We present new constraints on the merger history of the most X-ray luminous cluster of galaxies, RXJ1347.5-1145, based on its unique multiwavelength morphology. Our X-ray analysis confirms that the core gas is undergoing sloshing resulting from a prior, large-scale, gravitational perturbation. In combination with multiwavelength observations, the sloshing gas points to the primary and secondary clusters having had at least two prior strong gravitational interactions. The evidence supports a model in which the secondary subcluster with mass M = 4.8 +/- 2.4 x 10(14) M-circle dot has previously (greater than or similar to 0.6 Gyr ago) passed by the primary cluster, and has now returned for a subsequent crossing where the subcluster's gas has been completely stripped from its dark matter halo. RXJ1347 is a prime example of how core gas sloshing may be used to constrain the merger histories of galaxy clusters through multiwavelength analyses.
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