Spectral Features from the Reionization Epoch

Details Spectral Features from the Reionization Epoch Spectral Features from the Reionization Epoch

1997-07-27

arxiv.org/abs/astro-ph/9707295v2

Astrophys.J. 493 (1998) L1

Astronomy and Astrophysics

Astrophysics

12 pages, 4 figures, submitted to Ap. J. Letters

Scientific paper

10.1086/311120

Emission lines in hydrogen can be used to measure the approximate redshift of the reionization of the universe. This is an important measurement given the lack of a convincing theoretical prediction of this epoch. There is a rapid change in absorption at the reionization event, which can leave sharp features in the spectrum of recombining hydrogen. These features in the near infrared background permit us to measure the redshift at which reionization occurs. We have calculated these signals based on numerical simulations of the Lambda-CDM cosmogony.

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