Power spectrum of the dark ages


Lewis, A. (2007). Power spectrum of the dark ages. Perimeter Institute. https://pirsa.org/07040007


Lewis, Antony. Power spectrum of the dark ages. Perimeter Institute, Apr. 10, 2007, https://pirsa.org/07040007


          @misc{ pirsa_PIRSA:07040007,
            doi = {10.48660/07040007},
            url = {https://pirsa.org/07040007},
            author = {Lewis, Antony},
            keywords = {Cosmology},
            language = {en},
            title = {Power spectrum of the dark ages},
            publisher = {Perimeter Institute},
            year = {2007},
            month = {apr},
            note = {PIRSA:07040007 see, \url{https://pirsa.org}}

Antony Lewis University of Cambridge


In the future it may be possible to observe the CMB radiation at very low frequencies. I review the origin of the signal from 21cm absorption by dark-age gas and explain the huge potential for observational cosmology. I summarise recent work on theoretical expectations for the observable power spectrum, including discussion of Hubble-scale perturbations, the effects of perturbed recombination and non-linear evolution.