Inflationary Potential from 21 cm Tomography and Planck
arXiv:0810.3337 · doi:10.1016/j.physletb.2009.02.021
Abstract
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.
15 pages, 4 figures, 1 table. Version to appear in PLB
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- Eliminating the optical depth nuisance from the CMB with 21 cm cosmology
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- Higher Order Corrections to the Primordial Gravitational Wave Spectrum and its Impact on Parameter Estimates for Inflation
- Probing the Inflaton Potential with SKA