Constraints on ALPs and excited dark matter from the EDGES 21 cm absorption signal

Hektor, A.; Hütsi, Gert; Marzola, Luca; Vaskonen, Ville

doi:10.1016/j.physletb.2018.09.009

Cited by 22 publications

(12 citation statements)

References 88 publications

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“…Despite our emphasis on dark matter annihilation and decay, DarkHistory can be used to explore the effect of other forms of exotic particle injection. Other such possible sources include Hawking radiation from black holes [12,13], radiation from accretion onto black holes [14], and processes from new physics such as de-excitation of dark matter or decay of meta-stable species [15].…”

Section: Introductionmentioning

confidence: 99%

Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections

2020

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We present a new public Python package, DarkHistory, for computing the effects of dark matter annihilation and decay on the temperature and ionization history of the early universe. DarkHistory simultaneously solves for the evolution of the free electron fraction and gas temperature, and for the cooling of annihilation/decay products and the secondary particles produced in the process. Consequently, we can self-consistently include the effects of both astrophysical and exotic sources of heating and ionization, and automatically take into account backreaction, where modifications to the ionization/temperature history in turn modify the energy-loss processes for injected particles. We present a number of worked examples, demonstrating how to use the code in a range of different configurations, in particular for arbitrary dark matter masses and annihilation/decay final states. Possible applications of DarkHistory include mapping out the effects of dark matter annihilation/decay on the global 21cm signal and the epoch of reionization, as well as the effects of exotic energy injections other than dark matter annihilation/decay. The code is available at https://github.com/hongwanliu/DarkHistory with documentation at https://darkhistory.readthedocs.io. Data files required to run the code can be downloaded at https://doi.org/10.7910/DVN/DUOUWA. arXiv:1904.09296v1 [astro-ph.CO] 19 Apr 2019 1 We follow the standard astrophysical convention in which H and H + are denoted HI and HII, while He, He + and He 2+ are denoted HeI, HeII and HeIII respectively. 2 The value of β H used in DarkHistory includes the constant and gaussian fudge factors used by version 1.5.2 of RECFAST.

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Section: Introductionmentioning

confidence: 99%

Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections

2020

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“…[5,6]). On the other hand, the abnormal signal has been used to investigate the properties of dark matter (DM) [6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Constraints on primordial black holes and curvature perturbations from the global 21-cm signal

Yang

2020

Phys. Rev. D

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We investigate the effect of accreting primordial black holes (PBHs) on the thermal history of the intergalactic medium (IGM), including the accretion of baryonic matter and dark matter particle. The variations of the thermal history of the IGM caused by accreting PBHs will result in the changes of the global 21-cm signal in the cosmic dawn. Based on the detection of the global 21-cm signal by EDGES, by requiring the differential brightness temperature, e.g., δT21 < ∼ −100 (−50) mK, we obtain the upper limits on the abundance of PBHs for the mass range 10 < ∼ MPBH < ∼ 10 4 M . Compared with previous works, the limits are stronger for the mass range 10 < ∼ MPBH < ∼ 50 M .

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“…The evaporation of primordial black holes (PBHs) can be such a possible source that heats up the intergalactic medium (IGM) resulting in the rise in background temperature. Dark matter annihilation, decay and even the baryon-dark matter interaction could be the possible sources that can induce the larger than the expected separation between T s and T γ [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Exploring multimessenger signals from heavy dark matter decay with EDGES 21-cm result and IceCube

Halder,

Pandey,

Majumdar

et al. 2021

Preprint

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The primordial heavy or superheavy dark matter that could be created during the reheating or preheating stage of the Universe can undergo QCD cascade decay process to produce leptons or gamma as end products. Although these could be rare decays, the energy involved in such decay process can influence 21cm signal of hyperfine transition of neutral hydrogen during the reionization era. We explore in this work, possible multimessenger signals of such heavy dark matter decays.One of which could be the source of ultra high energy neutrino (of ∼ PeV energy regime) signals at IceCube detector whereas the other signal attributes to the cooling/heating of the baryons by the exchange of energy involved in this decay process and its consequent influence on 21cm signal. The effect of evaporation of primordial black holes and baryon scattering with light cold dark matter are also included in relation to the 21cm signal temperature and their influence are also discussed.

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Constraints on ALPs and excited dark matter from the EDGES 21 cm absorption signal

Cited by 22 publications

References 88 publications

Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections

Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections

Constraints on primordial black holes and curvature perturbations from the global 21-cm signal

Exploring multimessenger signals from heavy dark matter decay with EDGES 21-cm result and IceCube

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