Journal article

Modification of the 21-cm power spectrum by quasars during the epoch of reionization

Paul M Geil, J Stuart B Wyithe

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2009

Abstract

We assess the effect of a population of high-redshift quasars on the 21-cm power spectrum during the epoch of reionization. Our approach is to implement a seminumerical scheme to calculate the three-dimensional structure of ionized regions surrounding massive haloes at high redshift. We include the ionizing influence of luminous quasars by populating a simulated overdensity field with quasars using a Monte Carlo Markov Chain algorithm. We find that quasars modify both the amplitude and shape of the power spectrum at a level which is of the same order as the fractional contribution to reionization. The modification is found both at constant redshift and at constant global neutral fraction, an..

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University of Melbourne Researchers

Grants

Funding Acknowledgements

PMG acknowledges the support of an Australian Postgraduate Award and the hospitality of the Institute for Theory and Computation at the Harvard-Smithsonian Center for Astrophysics, where part of this research was done. The research was supported by the Australian Research Council (JSBW).