Inflationary Potential from 21 cm Tomography and Planck

Details Inflationary Potential from 21 cm Tomography and Planck Inflationary Potential from 21 cm Tomography and Planck

2008-10-20

arxiv.org/abs/0810.3337v2

Phys.Lett.B673:173-178,2009

Astronomy and Astrophysics

Astrophysics

15 pages, 4 figures, 1 table. Version to appear in PLB

Scientific paper

10.1016/j.physletb.2009.02.021

Three-dimensional neutral hydrogen mapping using the redshifted 21 cm line has recently emerged as a promising cosmological probe. Within the framework of slow-roll reconstruction, we analyze how well the inflationary potential can be reconstructed by combining data from 21 cm experiments and cosmic microwave background data from the Planck satellite. We consider inflationary models classified according to the amplitude of their tensor component, and show that 21 cm measurements can significantly improve constraints on the slow-roll parameters and determine the shape of the inflationary potential.

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