TY - JOUR
T1 - Observational constraints on warm quasi-exponential inflation
AU - Videla, Nelson
AU - Panotopoulos, Grigorios
N1 - 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
SN - 2470-0010
VL - 97
JO - Physical Review D
JF - Physical Review D
IS - 12
M1 - 123503
ER -