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11 December 2024

» arxiv » astro-ph/0701481

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When can the Planck satellite measure spectral index running?
Cédric Pahud ; Andrew R. Liddle ; Pia Mukherjee ; David Parkinson ;
Date:	16 Jan 2007
Abstract:	We use model selection forecasting to assess the ability of the Planck satellite to make a positive detection of spectral index running. We simulate Planck data for a range of assumed cosmological parameter values, and carry out a three-way Bayesian model comparison of a Harrison-Zel’dovich model, a power-law model, and a model including running. We find that Planck will be able to strongly support running only if its true value satisfies dn/d ln k > 0.02.
Source:	arXiv, astro-ph/0701481
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