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Cosmic Microwave Background constraint on residual annihilations of relic particles
Patrick McDonald, Robert J. Scherrer, Terry P. Walker
Energy injected into the Cosmic Microwave Background at redshifts z<10^6 will distort its spectrum permanently. In this paper we discuss the distortion caused by annihilations of r…
The Lyman-alpha Forest Flux Distribution at z\sim 5.2 and the Evolution of the Ionizing Background
Patrick McDonald, Jordi Miralda-Escude
We use the redshift evolution of the lyman-alpha forest mean transmitted flux at z>2.5 to infer the evolution of the intensity of the ionizing background, using theoretical predict…
A Measurement of the Temperature-Density Relation in the Intergalactic Medium Using a New Lyman-alpha Absorption Line Fitting Method
Patrick McDonald, Jordi Miralda-Escude, Michael Rauch +3
The evolution of the temperature in the intergalactic medium is related to the reionization of hydrogen and helium, and has important consequences for our understanding of the Lya…