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A Clustered Extragalactic Foreground Model for the EoR

Published online by Cambridge University Press:  08 May 2018

S. G. Murray Open the ORCID record for S. G. Murray [Opens in a new window] ,
C. M. Trott Open the ORCID record for C. M. Trott [Opens in a new window]  and
C. H. Jordan
S. G. Murray
Affiliation:
ARC Centre of Excellence for All-sky Astrophysics (CAASTRO) International Centre for Radio Astronomy Research (ICRAR), Curtin University, Bentley, WA 6102, Australia
C. M. Trott
Affiliation:
ARC Centre of Excellence for All-sky Astrophysics (CAASTRO) International Centre for Radio Astronomy Research (ICRAR), Curtin University, Bentley, WA 6102, Australia
C. H. Jordan
Affiliation:
ARC Centre of Excellence for All-sky Astrophysics (CAASTRO) International Centre for Radio Astronomy Research (ICRAR), Curtin University, Bentley, WA 6102, Australia
Rights & Permissions [Opens in a new window]

Abstract

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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.

Keywords

Epoch of ReionisationStatistical Methods
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 199 - 202
Copyright
Copyright © International Astronomical Union 2018 

References

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