Precise Measurements of Primordial Power Spectrum with 21 cm Fluctuations
Cosmology and Nongalactic Astrophysics
2015-06-15 v3 High Energy Physics - Phenomenology
Abstract
We discuss the issue of how precisely we can measure the primordial power spectrum by using future observations of 21 cm fluctuations and cosmic microwave background (CMB). For this purpose, we investigate projected constraints on the quantities characterizing primordial power spectrum: the spectral index n_s, its running alpha_s and even its higher order running beta_s. We show that future 21 cm observations in combinations with CMB would accurately measure above mentioned observables of primordial power spectrum. We also discuss its implications to some explicit inflationary models.
Keywords
Cite
@article{arxiv.1303.1688,
title = {Precise Measurements of Primordial Power Spectrum with 21 cm Fluctuations},
author = {Kazunori Kohri and Yoshihiko Oyama and Toyokazu Sekiguchi and Tomo Takahashi},
journal= {arXiv preprint arXiv:1303.1688},
year = {2015}
}
Comments
26 pages and 7 figures, delta alpha for k_ref = 0.05 /Mpc in Table 5 corrected (v2)