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Kenji Kadota
순수물리이론 연구단
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Cosmologically probing ultra-light particle dark matter using 21 cm signals

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Title
Cosmologically probing ultra-light particle dark matter using 21 cm signals
Author(s)
Kenji Kadota; Yi Mao; Kiyomoto Ichiki; Joseph Silk
Publication Date
2014-06
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v.2014, no.6, pp.011 -
Publisher
IOP PUBLISHING LTD
Abstract
There can arise ubiquitous ultra-light scalar fields in the Universe, such as the pseudo-Goldstone bosons from the spontaneous breaking of an approximate symmetry, which can make a partial contribution to the dark matter and affect the large scale structure of the Universe. While the properties of those ultra-light dark matter are heavily model dependent and can vary in a wide range, we develop a model-independent analysis to forecast the constraints on their mass and abundance using futuristic but realistic 21 cm observables as well as CMB fluctuations, including CMB lensing measurements. Avoiding the highly nonlinear regime, the 21 cm emission line spectra are most sensitive to the ultra-light dark matter with massm∼10−26eV for which the precision attainable on mass and abundance bounds can be of order of a few percent.
URI
https://pr.ibs.re.kr/handle/8788114/3342
ISSN
1475-7516
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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