The Rise and Fall of Hydrogen
Ue-Li Pen (CITA) - Sep 18
PPT of talk at 12:00 noon
The 21cm emission of hydrogen is in principle detectable throughout the
visible universe after recombination. In practice, only low redshift
hydrogen has been found and mapped. We review our theoretical
understanding of the history of neutral hydrogen from reionization
through today, and current efforts to open a new window on the universe
through the 21cm line. If a new generation of low frequency telescopes
succeeds, it will enlarge the mapped redshift volume of the universe by
several orders of magnitude, and result in precision determination of
dark energy and cosmological parameters.
The seminar will be held in 544 Campbell Hall.
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