TY - JOUR
T1 - Observational constraints on warm quasi-exponential inflation
AU - Videla, Nelson
AU - Panotopoulos, Grigorios
N1 - Funding Information:
We wish to thank the anonymous reviewer for comments and suggestions. N. V. was supported by Comisión Nacional de Ciencias y Tecnología of Chile through FONDECYT Grants No. 3150490 and No. 11170162. Additionally, N. V. would like to express his gratitude to the Instituto Superior Técnico of Universidade de Lisboa for its kind hospitality during the initial stage of this work. G. P. thanks the Fundação para a Ciência e Tecnologia (FCT), Portugal, for the financial support to the Center for Astrophysics and Gravitation-CENTRA, Instituto Superior Técnico, Universidade de Lisboa, through Grant No. UID/FIS/00099/2013. Finally, we wish to thank M. Olivares for helping us with the figures.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/6/15
Y1 - 2018/6/15
N2 - In the present work, we study a warm inflationary model defined by a quasi-exponential inflaton potential and an inflaton decay rate proportional to the Hubble rate. The model is characterized by three free parameters. We compute the power spectrum, the scalar spectral index, as well as the tensor-to-scalar ratio within the framework of the model, and we compare with the latest Planck data and also the BICEP2/Keck-Array data. On the r-ns plane, we show both the theoretical curves and the contour plots allowed by observations, and we constrain the parameters of the model accordingly. The nonlinear parameter fNL, corresponding to primordial non-Gaussianities, is also discussed and we found that the value predicted by our model is within the bounds imposed by current observational data.
AB - In the present work, we study a warm inflationary model defined by a quasi-exponential inflaton potential and an inflaton decay rate proportional to the Hubble rate. The model is characterized by three free parameters. We compute the power spectrum, the scalar spectral index, as well as the tensor-to-scalar ratio within the framework of the model, and we compare with the latest Planck data and also the BICEP2/Keck-Array data. On the r-ns plane, we show both the theoretical curves and the contour plots allowed by observations, and we constrain the parameters of the model accordingly. The nonlinear parameter fNL, corresponding to primordial non-Gaussianities, is also discussed and we found that the value predicted by our model is within the bounds imposed by current observational data.
UR - http://www.scopus.com/inward/record.url?scp=85049510959&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.97.123503
DO - 10.1103/PhysRevD.97.123503
M3 - Article
AN - SCOPUS:85049510959
VL - 97
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 12
M1 - 123503
ER -