Survey parameters for detecting 21-cm-Ly a emitter cross-correlations with the Square Kilometre Array
|dc.identifier.citation||Hutter, A. and Trott, C. and Dayal, P. 2018. Survey parameters for detecting 21-cm-Ly a emitter cross-correlations with the Square Kilometre Array. Monthly Notices of the Royal Astronomical Society: Letters. 479 (1): pp. L129-L133.|
Detections of the cross-correlation signal between the 21 cm signal during reionization and high-redshift Lyman-a(Ly a) emitters (LAEs) are subject to observational uncertainties which mainly include systematics associated with radio interferometers and LAE selection. These uncertainties can be reduced by increasing the survey volume and/or the survey luminosity limit, i.e. the faintest detectable Ly a luminosity. We use our model of high-redshift LAEs and the underlying reionization state to compute the uncertainties of the 21-cm-LAE crosscorrelation function at z ?6.6 for observations with SKA1-Low and LAE surveys with ?z =0.1 for three different values of the average inter-galactic medium (IGM) ionization state (<?HI>? 0.1, 0.25, 0.5). At z?6.6, we find SILVERRUSH type surveys, with a field of view of 21 deg2and survey luminosity limits of La=7.9×1042erg s-1, to be optimal to distinguish between an IGM that is 50, 25, and 10 per cent neutral, while surveys with smaller fields of view and lower survey luminosity limits, such as the 5 and 10 deg2surveys with WFIRST, can only discriminate between a 50 and 10 per cent neutral IGM.
|dc.publisher||Wiley-Blackwell Publishing Ltd.|
|dc.title||Survey parameters for detecting 21-cm-Ly a emitter cross-correlations with the Square Kilometre Array|
|dcterms.source.title||Monthly Notices of the Royal Astronomical Society: Letters|
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
|curtin.department||Curtin Institute of Radio Astronomy (Physics)|