Impact of radiation from primordial black holes on the 21-cm angular-power spectrum in the dark ages

Yang, Yupeng

doi:10.1103/physrevd.106.123508

Cited by 4 publications

(2 citation statements)

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“…If deviations of the Dark Ages 21-cm signal from the predictions of the standard ΛCDM cosmology are observed, this could be a signature of dark matter physics [128][129][130][131][132][133], or other exotic processes [55,[134][135][136][137]. In any theory in which new phenomena contribute to structure formation, heating or ionization at early times, these signatures will be directly imprinted in the 21-cm signal.…”

Section: (B) the Unseen Dark Agesmentioning

confidence: 99%

“…In any theory in which new phenomena contribute to structure formation, heating or ionization at early times, these signatures will be directly imprinted in the 21-cm signal. Some examples include ultra-light axions which would affect the 21-cm signal by changing the matter power spectrum and thus affecting the collapse of early structures [ 133 ], dark matter annihilation or decay which could change temperature and ionization state of the gas [ 129 , 132 ], primordial black holes which effect the signal through Hawking radiation (evaporation) or emitting radiation in the process of accretion [ 55 , 134 , 136 ] and superconducting cosmic strings (e.g. [ 135 ]).…”

Section: Science From the Moonmentioning

confidence: 99%

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Cosmic mysteries and the hydrogen 21-cm line: bridging the gap with lunar observations

Fialkov,

Gessey-Jones,

Dhandha

2024

Phil. Trans. R. Soc. A.

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The hydrogen 21-cm signal is predicted to be the richest probe of the young Universe, including those eras known as the cosmic Dark Ages, the Cosmic Dawn (when the first star and black hole formed) and the Epoch of Reionization. This signal holds the key to deciphering processes that take place at the early stages of cosmic history. In this opinion piece, we discuss the potential scientific merit of lunar observations of the 21-cm signal and their advantages over more affordable terrestrial efforts. The Moon is a prime location for radio cosmology which will enable precision observations of the low-frequency radio sky. The uniqueness of such observations is that they will provide an unparalleled opportunity to test cosmology and the nature of dark matter using the Dark Ages 21-cm signal. No less enticing is the opportunity to obtain a much clearer picture of the Cosmic Dawn than that currently achievable from the ground, which will allow us to determine the properties of the first stars and black holes. This article is part of a discussion meeting issue ‘Astronomy from the Moon: the next decades (part 2)’.

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