Journal
ASTROPHYSICAL JOURNAL
Volume 752, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/752/2/137
Keywords
cosmology: observations; methods: data analysis; techniques: interferometric
Categories
Funding
- National Science Foundation Astronomy Division through CAREER award [0847753]
- NSF Postdoctoral Fellowship [1003314]
- University of Washington
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0847753] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1003314] Funding Source: National Science Foundation
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Contamination from instrumental effects interacting with bright astrophysical sources is the primary impediment to measuring Epoch of Reionization (EoR) and Baryon Acoustic Oscillations (BAO) 21 cm power spectra-an effect called mode mixing. In this paper, we identify four fundamental power spectrum shapes produced by mode mixing that will affect all upcoming observations. We are able, for the first time, to explain the wedge-like structure seen in advanced simulations and to forecast the shape of an EoR window that is mostly free of contamination. Understanding the origins of these contaminations also enables us to identify calibration and foreground subtraction errors below the imaging limit, providing a powerful new tool for precision observations.
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