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Dark before light: Testing the cosmic expansion history through the cosmic microwave background

Title
Dark before light: Testing the cosmic expansion history through the cosmic microwave background
Authors
Linder E.V.Smith T.L.
Ewha Authors
Eric V. Linder
Issue Date
2011
Journal Title
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516JCR Link
Citation
vol. 2011, no. 4
Indexed
SCIE; SCOPUS WOS scopus
Abstract
The cosmic expansion history proceeds in broad terms from a radiation dominated epoch to matter domination to an accelerated, dark energy dominated epoch. We investigate whether intermittent periods of acceleration (from a canonical, minimally coupled scalar field) are possible in the early universe - between Big Bang nucleosynthesis (BBN) and recombination and beyond. We establish that the standard picture is remarkably robust: anisotropies in the cosmic microwave background consistent with ΛCDM will exclude any extra period of accelerated expansion between 1 z105 (corresponding to 5 × 10-4eV T25eV). © 2011 IOP Publishing Ltd and SISSA.
DOI
10.1088/1475-7516/2011/04/001
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자연과학대학 > 물리학전공 > Journal papers
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