When can the Planck satellite measure spectral index running?

被引：17
|
作者：
Pahud, Cedric [1 ]
Liddle, Andrew R. [1 ]
Mukherjee, Pia [1 ]
Parkinson, David [1 ]
机构：
[1] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 381卷 / 02期
关键词：
cosmology; theory;
D O I：
10.1111/j.1365-2966.2007.12310.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：489 / 493
页数：5
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