Research Article

Warm Inflation with Nonminimal Derivative Coupling

Figure 4

Evolution of the tensor-to-scalar ratio (a) and running of the scalar spectral index (b) versus the scalar spectral index for natural inflation in the background of Planck + WMAP9 + BAO + data. The figure has been plotted for , , and , with and as a free parameter.
343819.fig.004a
(a)
343819.fig.004b
(b)