천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제46권2호
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- Pages.72.2-72.2
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- 2021
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- 1226-2692(pISSN)
Probing the Early Phase of Reionization through LiteBIRD
- Ahn, Kyungjin (Chosun University) ;
- Sakamoto, Hina (University of Nagoya) ;
- Ichiki, Kiyotomo (University of Nagoya) ;
- Moon, Hyunjin (Chosun University) ;
- Hasegawa, Kenji (University of Nagoya)
- 발행 : 2021.10.13
초록
Cosmic reionization imprints its history on the sky map of the cosmic microwave background (CMB) polarization. Even though mild, the signature of the reionization history during its early phase (z>15) can also impact the CMB polarization. We forecast the observational capability of the LiteBIRD(Lite(Light) satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection), a truly cosmic-variance limited apparatus. We focus on the capability for such an apparatus to probe the partial optical depth of the CMB photons during z>15. We show that LiteBIRD is able to probe this quantity with a modest to high significance, enabling one to tell how efficient the cosmic reionization and star formation were at z>15.
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