Table of Contents
Universe, Volume 4, Issue 2 (February 2018)
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Cover Story (view full-size image) Due to the dozens of inflationary models, we do not know much about the inflationary era of the [...] Read more. Due to the dozens of inflationary models, we do not know much about the inflationary era of the universe. We should therefore aim to have only a few acceptable models. The main article in this issue tries to eliminate as many models as possible by showing that their predictions are in conflict with cosmological observations, particularly the CMB-observations performed by the Planck team. Thirty-three model classes have been reviewed, about half of which have been falsified by the present observations. The review also gives a systematic presentation of the different slow roll parameters, the N-formalism and the optical parameters of the inflationary models. It is found that the warm inflation models—more complete than the cold models since they take into consideration the transition of dark energy into radiation—are favored by the observations. View this paper