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Kenji Kadota
순수물리이론 연구단
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Cross-correlation between 21-cm radiation and CMB B modes from the cosmic birefringence in the presence of a light scalar field

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Title
Cross-correlation between 21-cm radiation and CMB B modes from the cosmic birefringence in the presence of a light scalar field
Author(s)
Kenji Kadota; Junpei Ooba; Hiroyuki Tashiro; Kiyotomo Ichiki; Guo-Chin Liu
Publication Date
2019-09
Journal
PHYSICAL REVIEW D, v.100, no.6, pp.063506 -
Publisher
AMER PHYSICAL SOC
Abstract
We study the cross-correlation between the 21-cm and cosmic microwave background (CMB) B mode fluctuations which are induced by the cosmic birefringence when the nonconstant scalar field couples to the electromagnetic field strength. Such multiwavelength signals can potentially probe the reionization history of the Universe and also explore the nature of fundamental physics such as the parity violation and the scalar field dynamics in the early Universe. We illustrate the feasibility to detect such 21-cm-B mode cross-correlations through commonly discussed scalar field models, the quintessence-like scalar field which is responsible for the current dark energy and the axionlike scalar field which is responsible for the current dark matter density. © 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6421
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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