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• W1119932062 abstract "Reheating is the epoch which connects inflation to the subsequent hot big-bang phase. Conceptually very important, this era is, however, observationally poorly known. We show that the current Planck satellite measurements of the cosmic microwave background (CMB) anisotropies constrain the kinematic properties of the reheating era for most of the inflationary models. This result is obtained by deriving the marginalized posterior distributions of the reheating parameter for about 200 models of slow-roll inflation. Weighted by the statistical evidence of each model to explain the data, we show that the Planck 2013 measurements induce an average reduction of the posterior-to-prior volume by 40%. Making some additional assumptions on reheating, such as specifying a mean equation of state parameter, or focusing the analysis on peculiar scenarios, can enhance or reduce this constraint. Our study also indicates that the Bayesian evidence of a model can substantially be affected by the reheating properties. The precision of the current CMB data is therefore such that estimating the observational performance of a model now requires incorporating information about its reheating history.Received 4 November 2014DOI:https://doi.org/10.1103/PhysRevLett.114.081303© 2015 American Physical Society" @default.
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• W1119932062 date "2015-02-26" @default.
• W1119932062 modified "2023-10-13" @default.
• W1119932062 title "Observing Inflationary Reheating" @default.
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• W1119932062 doi "https://doi.org/10.1103/physrevlett.114.081303" @default.
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