Journal
ASTROPHYSICS AND SPACE SCIENCE
Volume 358, Issue 2, Pages -Publisher
SPRINGER
DOI: 10.1007/s10509-015-2423-3
Keywords
Inflation; Cosmological perturbations; Non-Gaussianity; Non-minimal coupling; Observational constraints
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We study an inflationary model which a tachyon field, that is nonminimally coupled to the Gauss-Bonnet term, drives the inflation. The primordial perturbations in this setup are studied with details. By taking an exponential potential into account and performing a numerical analysis on the perturbation parameters, we obtain some constraints on the Gauss-Bonnet coupling parameter. Finally, the non-Gaussianity feature of the primordial tachyonic perturbations in this setup is studied.
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