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Paper: 21cm Cosmology and the Cosmic Near Infrared Background
Volume: 525, 2020 Compendium of Undergraduate Research in Astronomy and Space Science
Page: 29
Authors: Higgins, L.; Schauer, A. T. P.; Bromm, V.
Abstract: Population III (Pop III) stars are the first luminous objects to emerge after the cosmic dark ages, possibly contributing to the near-IR cosmic background (NIRCB). No direct observations of these first stars have yet been made, so we rely on indirect measurements such as those provided by 21 cm cosmology. Our Pop III star formation rate density is consistent with the recent detection of the global 21 cm absorption from neutral hydrogen, implying that the signal originates in the redshift range 15≤ z ≤20. We find that the predicted Pop III star formation rate densities are insufficient to account for the current upper limits on the NIRCB. Pop II stars or some other Lyα producing sources could thus contribute to the unresolved fraction of the NIRCB.
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