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Toyokazu Sekiguchi
순수물리이론 연구단
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Elucidating dark energy with future 21 cm observations at the epoch of reionization

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Title
Elucidating dark energy with future 21 cm observations at the epoch of reionization
Author(s)
Kazunori Kohri; Yoshihiko Oyama; Toyokazu Sekiguchi; Tomo Takahashi
Publication Date
2017-02
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v.2017, no.2, pp.024 -
Publisher
IOP PUBLISHING LTD
Abstract
We investigate how precisely we can determine the nature of dark energy such as the equation of state (EoS) and its time dependence by using future observations of 21 cm fluctuations at the epoch of reionization (06.8≲ z≲1) such as Square Kilometre Array (SKA) and Omniscope in combination with those from cosmic microwave background, baryon acoustic oscillation, type Ia supernovae and direct measurement of the Hubble constant. We consider several parametrizations for the EoS and find that future 21 cm observations will be powerful in constraining models of dark energy, especially when its EoS varies at high redshifts. © 2017 IOP Publishing Ltd and Sissa Medialab srl
URI
https://pr.ibs.re.kr/handle/8788114/3465
ISSN
1475-7516
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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