When can the Planck satellite measure spectral index running?
Astrophysics
2008-11-26 v2
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.
Keywords
Cite
@article{arxiv.astro-ph/0701481,
title = {When can the Planck satellite measure spectral index running?},
author = {Cédric Pahud and Andrew R. Liddle and Pia Mukherjee and David Parkinson},
journal= {arXiv preprint arXiv:astro-ph/0701481},
year = {2008}
}
Comments
5 pages with 7 figures included. Full resolution PDF at http://astronomy.susx.ac.uk/~andrewl/planckev2D.pdf Minor updates to match version accepted by MNRAS