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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
The Baryon Content of the Local Intergalactic Medium
John T. Stocke, J. Michael Shull, Steven V. Penton
We describe our surveys of low column density Lyman-alpha absorbers [N(HI) = 10^(12.5-16.0) cm^-2], which show that the warm photoionized IGM contains 30% of all baryons at z < 0.1…