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Hydrogen was not ionized abruptly

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  • Jonathan Pritchard

    (Jonathan Pritchard and Abraham Loeb are in the Institute for Theory and Computation, Harvard University, Cambridge, Massachusetts 02138, USA. jpritchard@cfa.harvard.edu; aloeb@cfa.harvard.edu)

  • Abraham Loeb

    (Jonathan Pritchard and Abraham Loeb are in the Institute for Theory and Computation, Harvard University, Cambridge, Massachusetts 02138, USA. jpritchard@cfa.harvard.edu; aloeb@cfa.harvard.edu)

Abstract

When and how the first stars and galaxies ionized the primordial hydrogen atoms that filled the early Universe is not known. Observations with a single radio antenna are opening a new window on the process. See Letter p.796

Suggested Citation

  • Jonathan Pritchard & Abraham Loeb, 2010. "Hydrogen was not ionized abruptly," Nature, Nature, vol. 468(7325), pages 772-773, December.
    • Handle: RePEc:nat:nature:v:468:y:2010:i:7325:d:10.1038_468772b
    DOI: 10.1038/468772b
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