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The Outer Limits of Galaxy Clusters: Observations to the Virial Radius with Suzaku, XMM, and Chandra
Eric D. Miller, Marshall Bautz, Jithin George +3
The outskirts of galaxy clusters, near the virial radius, remain relatively unexplored territory and yet are vital to our understanding of cluster growth, structure, and mass. In t…
Finding Fossil Groups: Optical Identification and X-ray Confirmation
Eric D. Miller, Eli Rykoff, Renato Dupke +6
We report the discovery of 12 new fossil groups of galaxies, systems dominated by a single giant elliptical galaxy and cluster-scale gravitational potential, but lacking the popula…
On the mass-to-light ratios of fossil groups. Are they simply dark clusters?
Robert N. Proctor, Claudia Mendes de Oliveira, Renato Dupke +4
Defined as X-ray bright galaxy groups with large differences between the luminosities of their brightest and second brightest galaxies, "fossil groups" are believed to be some of t…