G-warm inflation

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Abstract

A warm inflationary universe in the context of Galileon model or G-model is studied. Under a general formalism we study the inflationary dynamics and the cosmological perturbations considering a coupling of the form G(φ,X)=g(φ) X. As a concrete example, we consider an exponential potential together with the cases in which the dissipation and Galilean coefficients are constants. Also, we study the weak regime given by the condition R<1+3gH, and the strong regime in which 1<R+3gH. Additionally, we obtain constraints on the parameters during the evolution of G-warm inflation, assuming the condition for warm inflation in which the temperature T>H, the conditions or the weak and strong regimes, together with the consistency relation r=r(ns) from Planck data.

Original languageEnglish
Article number029
JournalJournal of Cosmology and Astroparticle Physics
Volume2017
Issue number5
DOIs
StatePublished - 15 May 2017
Externally publishedYes

Keywords

  • Alternatives to inflation
  • cosmology of theories beyond the SM
  • inflation

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