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Nonlinear Peculiar Velocity and Inhomogeneous Reionization Spoil 21 cm Cosmology from the Epoch of Reionization?
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 110, no 15, 151301- p.Article in journal (Refereed) Published
Abstract [en]

The 21 cm background from the epoch of reionization is a promising cosmological probe: line-of-sight velocity fluctuations distort redshift, so brightness fluctuations in Fourier space depend upon angle, which linear theory shows can separate cosmological from astrophysical information. Nonlinear fluctuations in ionization, density, and velocity change this, however. The validity and accuracy of the separation scheme are tested here for the first time, by detailed reionization simulations. The scheme works reasonably well early in reionization (<= 40% ionized), but not late (<= 80% ionized). DOI: 10.1103/PhysRevLett.110.151301

Place, publisher, year, edition, pages
2013. Vol. 110, no 15, 151301- p.
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Physical Sciences
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URN: urn:nbn:se:su:diva-89992DOI: 10.1103/PhysRevLett.110.151301ISI: 000317458400006OAI: oai:DiVA.org:su-89992DiVA: diva2:622190
Funder
Swedish Research Council, 2009-4088
Note

AuthorCount:7;

Available from: 2013-05-20 Created: 2013-05-20 Last updated: 2017-12-06Bibliographically approved

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