| Redshifted 21cm Observations of High Redshift Quasar Proximity Zones (2008) | |||||||||
Abstract | |||||||||
| The introduction of low-frequency radio arrays is expected to revolutionize the study of the reionization epoch. Observation of the contrast in redshifted 21cm emission between a large HII region and the surrounding neutral inter-galactic medium (IGM) will be the simplest and most easily interpreted signature. However the highest redshift quasars known are thought to reside in an ionized IGM. Using a semi-analytic model we describe the redshifted 21cm signal from the IGM surrounding quasars discovered using the i-drop out technique (i.e. quasars at z~6). We argue that while quasars at z. Comment: 14 pages, 9 figures. Accepted for publication in MNRAS | |||||||||
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