AAS 207th Meeting, 8-12 January 2006
Session 33 Epoch of Reionization: Observing Cosmic HI at 21cm
Poster, Monday, 9:20am-7:00pm, January 9, 2006, Exhibit Hall

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[33.04] Improving Foreground Subtraction in EOR Power Spectrum Observations

M.F. Morales (CfA), J.D. Bowman, J.N. Hewitt (MKI)

Statistical observations of the Epoch of Reionization using the 21 cm line of neutral hydrogen have the potential to revolutionize our understanding of structure formation and the first luminous objects. However, these observations are complicated by a host of strong foreground sources. Several foreground removal techniques have been proposed in the literature, and it has been assumed that these would be used in combination to reveal the Epoch of Reionization (EOR) signal. By studying the characteristic subtraction errors of the proposed foreground removal techniques, we identify an additional subtraction stage that can further reduce the EOR foreground contamination, and study the interactions between the foreground removal algorithms. This enables us to outline a comprehensive foreground removal strategy that incorporates all previously proposed subtraction techniques.

The author(s) of this abstract have provided an email address for comments about the abstract: mmorales@cfa.harvard.edu

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