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General dissipative coefficient in warm intermediate inflation in Loop Quantum Cosmology in light of Planck and BICEP2
Videla, Nelson; Herrera, Ramón; Olivares, Marco
In this paper, we study a warm intermediate inflationary model with a general form for the dissipative coefficient Γ(T, ϕ) = CϕTm/ϕm-1 in the context of Loop Quantum Cosmology (LQC). We examine this model in the weak and strong dissipative regimes. In general, we discuss in great detail the characteristics of this …
UV surface brightness of galaxies from the local universe to z ~ 5
Scarpa, Riccardo; Falomo, Renato; Lerner, Eric J.
The Tolman test for surface brightness (SB) dimming was originally proposed as a test for the expansion of the universe. The test, which is independent of the details of the assumed cosmology, is based on comparisons of the SB of identical objects at different cosmological distances. Claims have been made that the Tolman test provides compelling e…
BICEP2 constrains composite inflation
Channuie, Phongpichit
In light of BICEP2, we re-examine single field inflationary models in which the inflation is a composite state stemming from various four-dimensional strongly coupled theories. We study in the Einstein frame a set of cosmological parameters, the primordial spectral index ns and tensor-to-scalar ratio r, predicted by such models. We conf…