Open AccessWhen can the Planck satellite measure spectral index running?
Author(s) -
Pahud Cédric,
Liddle Andrew R.,
Mukherjee Pia,
Parkinson David
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2007.12310.x
Subject(s) - planck , physics , measure (data warehouse) , spectral index , satellite , planck energy , statistical physics , index (typography) , range (aeronautics) , astrophysics , planck scale , astronomy , spectral line , quantum mechanics , data mining , computer science , quantum gravity , world wide web , quantum , materials science , composite material
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 |d n /d ln k | > 0.02 .