674 citations
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astro-ph.CO2013★ 10 cited
The 21cm Power Spectrum and the Shapes of Non-Gaussianity
Sirichai Chongchitnan
We consider how measurements of the 21cm radiation from the epoch of reionization (z=8-12) can constrain the amplitudes of various `shapes' of primordial non-Gaussianity. The limit…
astro-ph.CO2012★ 19 cited
The 21cm radiation from minihalos as a probe of small primordial non-Gaussianity
Sirichai Chongchitnan, Joseph Silk
We present a new probe of primordial non-Gaussianity via the 21cm radiation from minihalos at high redshifts. We calculate the fluctuations in the brightness temperature (measured…