The observable signature of late heating of the Universe during cosmic reionization

Anastasia Fialkov (), Rennan Barkana () and Eli Visbal
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Anastasia Fialkov: Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
Rennan Barkana: Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
Eli Visbal: Columbia University, 550 West 120th Street, New York, New York 10027, USA

Nature, 2014, vol. 506, issue 7487, 197-199

Abstract: The hard spectra of X-ray binaries make them ineffective at heating primordial gas, which must have resulted in a delayed and spatially uniform heating during the epoch of reionization; this means that the signature of reionization in spectra of the 21-cm transition of atomic hydrogen will produce a more complex signal than has been predicted, including a distinct minimum at less than a millikelvin.

Date: 2014
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DOI: 10.1038/nature12999

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