Merging Binary Clusters

Details Merging Binary Clusters Merging Binary Clusters

2001-06-26

arxiv.org/abs/astro-ph/0106482v3

Astronomy and Astrophysics

Astrophysics

12 pages, 3 full page figures in color, accepted for publication in the Astrophysical Journal

Scientific paper

We study three prominent bi-modal X-ray clusters: A3528, A1750 and A3395. Using observations taken with ROSAT and ASCA, we analyze the temperature and surface brightness distributions. We also analyze the velocity distributions of the three clusters using new measurements supplemented with previously published data. We examine both the overall cluster properties, as well as the two sub-cluster elements in each. These results are then applied to the determination of the overall cluster masses, and demonstrate excellent consistency between the various methods used. While the characteristic parameters of the sub-clusters are typical of isolated objects, our temperature results for the regions between the two sub-clusters clearly confirm the presence of merger activity. These three clusters represent a progression of equal-sized sub-cluster mergers, starting from initial contact to immediately before first core passage.

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