Inflation models, spectral index and observational constraints

Details Inflation models, spectral index and observational constraints Inflation models, spectral index and observational constraints

2000-03-30

arxiv.org/abs/astro-ph/0003458v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, contribution to the Proceedings of Moriond 2000 "Energy Densities in the Universe", Les Arcs, France, Janua

Scientific paper

We have evaluated the observational constraints on the spectral index $n$, in the context of a $\Lambda$CDM model. For $n$ scale-independent, as predicted by most models of inflation, present data require $n\simeq 1.0 \pm 0.1$ at the 2-$\sigma$ level. We have also studied the two-parameter scale-dependent spectral index, predicted by running-mass inflation models. Present data allow significant variation of $n$ in this case, within the theoretically preferred region of parameter space.

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