Measurement of the baryonic acoustic oscillation scale in 21 cm intensity fluctuations during the reionization era
Kirsty J Rhook, Paul M Geil, J Stuart B Wyithe
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | WILEY-BLACKWELL PUBLISHING, INC | Published : 2009
It has recently been suggested that the power spectrum of redshifted 21 cm fluctuations could be used to measure the scale of baryonic acoustic oscillations (BAOs) during the reionization era. The resulting measurements are potentially as precise as those offered by the next generation of galaxy redshift surveys at lower redshift. However, unlike galaxy redshift surveys, which in the linear regime are subject to a scale-independent galaxy bias, the growth of ionized regions during reionization is thought to introduce a strongly scale-dependent relationship between the 21 cm and mass power spectra. We use a seminumerical model for reionization to assess the impact of ionized regions on the pr..View full abstract
We thank the referee for useful comments. KJR acknowledges the support and hospitality of the Department of Physics, University of Melbourne, and a visiting postgraduate Marie Curie Fellowship hosted by MPA. The research was supported by the Australian Research Council (JSBW). PMG acknowledges the support of an Australian Postgraduate Award.