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Title:
Merging Binary Clusters
Authors:
Donnelly, R. Hank; Forman, W.; Jones, C.; Quintana, H.; Ramirez, A.; Churazov, E.; Gilfanov, M.
Affiliation:
AA(; Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AB(; Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AC(; Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AD(; Department of Astronomy and Astrophysics, Pontificia Universidad Catolica de Chile, Casilla 104, Santiago 22, Chile.), AE(; Department of Physics, Universidad de La Serena, Benavente 980, La Serena, Chile.), AF(; Max Planck Institute für Astrophysik, 85740 Garching bei München, Germany.; Space Research Institute (IKI), Moscow 117810, Russia.), AG(; Max Planck Institute für Astrophysik, 85740 Garching bei München, Germany.; Space Research Institute (IKI), Moscow 117810, Russia.)
Publication:
The Astrophysical Journal, Volume 562, Issue 1, pp. 254-265. (ApJ Homepage)
Publication Date:
11/2001
Origin:
UCP
ApJ Keywords:
galaxies: clusters: individual (A1750, A3395, A3528, SC 0627-54), Galaxies: Intergalactic Medium, X-Rays: Galaxies: Clusters
DOI:
10.1086/323521
Bibliographic Code:
2001ApJ...562..254D

Abstract

We study three prominent bimodal 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 subcluster elements in each. These results are then applied to the determination of the overall cluster masses; they demonstrate excellent consistency between the various methods used. While the characteristic parameters of the subclusters are typical of isolated objects, our temperature results for the regions between the two subclusters clearly confirm the presence of merger activity. These three clusters represent a progression of equal-sized subcluster mergers, starting from initial contact to immediately before first core passage.
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