Interpretation of the EDGES observation in light of Planck 2018 Legacy Data

  • Ahn, Kyungjin (Chosun University) ;
  • Shapiro, Paul R. (University of Texas at Austin)
  • 발행 : 2020.10.13

초록

The Experiment to Detect the Global EoR Signature (EDGES) has probed the status of the early Universe through the global 21cm observation. The claimed (brightness temperature) of ~ 500 mK absorption dip at z~17 against the continuum background cannot be explained in the standard LambdaCDM framework. In the meantime, the Planck 2018 Legacy Data, especially the E-mode polarization power spectrum, puts rather strong constraints on the high-redshift reionization process. We show how these two observational contraints can be accomodated in a series of reionization scenarios, with a special focus on the strongly self-regulated reionization by first stars.

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