370 citations
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Showing 2004Show all
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astro-ph2004★ 1 cited
He II Reionization and Sources of Metagalactic Ionization
J. Michael Shull
Intergalactic Ly-alpha opacity suggests that H I was reionized at z ~ 6, while He II reionization was delayed to z ~ 3. Both epochs are in conflict with inferences from CMB optical…
astro-ph2004
Chandra X-ray Observations of Newly Discovered, z ~ 1 Clusters from the Red-Sequence Cluster Survey
Amalia Hicks, Erica Ellingson, Mark Bautz +3
Observational studies of cluster evolution over moderate redshift ranges (to z ~ 1) are a powerful tool for constraining cosmological parameters, yet a comprehensive knowledge of t…