Astrophysics from the Highly-Redshifted 21 cm Line

Steven Furlanetto , Adam Lidz , Abraham Loeb , Matthew McQuinn , Jonathan Pritchard , James Aguirre , Marcelo Alvarez , Donald Backer

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Judd Bowman Jack Burns Chris Carilli Renyue Cen Asantha Cooray Nickolay Gnedin Lincoln Greenhill Zoltan Haiman Jacqueline Hewitt Joseph Lazio Andrei Mesinger Piero Madau Miguel Morales S. Peng Oh Jeffrey Peterson Ylva Pihlstrom Paul Shapiro Max Tegmark Hy Trac Oliver Zahn Matias Zaldarriaga

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classification 🌌 astro-ph.CO

keywords astrophysicsdescribefirstformationgalaxiesgalaxylineneutral

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The cosmic dark ages and the epoch of reionization, during which the first generations of stars and galaxies formed, are among the most compelling frontiers of extragalactic astrophysics and cosmology. Here we describe an exciting new probe of these eras: the 21 cm line of neutral hydrogen, which will allow us to map the neutral intergalactic medium throughout the era of first galaxy formation. In this white paper, we describe how these studies can answer two key questions about galaxy formation: What were the properties of high-redshift galaxies? How did they affect the Universe around them?

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Astrophysics from the Highly-Redshifted 21 cm Line

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