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20 papers · 1 filter
Simulating Cosmic Reionization
Ilian T. Iliev, Paul R. Shapiro, Garrelt Mellema +2
The Cosmic Dark Ages and the Epoch of Reionization constitute a crucial missing link in our understanding of the evolution of the intergalactic medium and the formation and evoluti…
Cosmic rays through the Higgs portal
Rainer Dick, Robert B. Mann, Kai E. Wunderle
We consider electroweak singlet dark matter with a mass comparable to the Higgs mass. The singlet is assumed to couple to standard matter through a perturbative coupling to the Hig…
The HST/ACS Coma Cluster Survey: I - Survey Objectives and Design
David Carter, Paul Goudfrooij, Bahram Mobasher +34
We describe the HST ACS Coma cluster Treasury survey, a deep two-passband imaging survey of one of the nearest rich clusters of galaxies, the Coma cluster (Abell 1656). The survey…
Heating Hot Atmospheres with Active Galactic Nuclei
B. R. McNamara, P. E. J. Nulsen
High resolution X-ray spectroscopy of the hot gas in galaxy clusters has shown that the gas is not cooling to low temperatures at the predicted rates of hundreds to thousands of so…
Jet Interactions with the Hot Halos of Clusters and Galaxies
B. R. McNamara, L. Birzan, D. A. Rafferty +3
X-ray observations of cavities and shock fronts produced by jets streaming through hot halos have significantly advanced our understanding of the energetics and dynamics of extraga…
Testing modified gravity with globular cluster velocity dispersions
J. W. Moffat, V. T. Toth
Globular clusters (GCs) in the Milky Way have characteristic velocity dispersions that are consistent with the predictions of Newtonian gravity, and may be at odds with Modified Ne…