A Clustered Extragalactic Foreground Model for the EoR

© 2018 International Astronomical Union. We review an improved statistical model of extra-galactic point-source foregrounds first introduced in Murray et al. (2017), in the context of the Epoch of Reionization. This model extends the instrumentally-convolved foreground covariance used in inverse-cov...

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Bibliographic Details
Main Authors: Murray, Steven, Trott, Cathryn, Jordan, Christopher
Format: Journal Article
Published: 2018
Online Access:http://hdl.handle.net/20.500.11937/68978
Description
Summary:© 2018 International Astronomical Union. We review an improved statistical model of extra-galactic point-source foregrounds first introduced in Murray et al. (2017), in the context of the Epoch of Reionization. This model extends the instrumentally-convolved foreground covariance used in inverse-covariance foreground mitigation schemes, by considering the cosmological clustering of the sources. In this short work, we show that over scales of k ~ (0.6, 40.)hMpc -1 , ignoring source clustering is a valid approximation. This is in contrast to Murray et al. (2017), who found a possibility of false detection if the clustering was ignored. The dominant cause for this change is the introduction of a Galactic synchrotron component which shadows the clustering of sources.