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Constraining the dark matter-vacuum energy interaction using the EDGES 21-cm absorption signal

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Constraining the dark matter-vacuum energy interaction using the EDGES 21-cm absorption signal. / Wang, Yuting; Zhao, Gong-Bo.

In: The Astrophysical Journal, Vol. 869, No. 1, 26, 07.12.2018.

Research output: Contribution to journalArticlepeer-review

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Wang, Yuting ; Zhao, Gong-Bo. / Constraining the dark matter-vacuum energy interaction using the EDGES 21-cm absorption signal. In: The Astrophysical Journal. 2018 ; Vol. 869, No. 1.

Bibtex

@article{2d1ea629ed3d4764ae3e8cd477d154b5,
title = "Constraining the dark matter-vacuum energy interaction using the EDGES 21-cm absorption signal",
abstract = " The recent measurement of the global 21-cm absorption signal reported by the Experiment to Detect the Global Epoch of Reionization Signature (EDGES) Collaboration is in tension with the prediction of the ΛCDM model at a 3.8σ significance level. In this work, we report that this tension can be released by introducing an interaction between dark matter and vacuum energy. We perform a model parameter estimation using a combined dataset including EDGES and other recent cosmological observations, and find that the EDGES measurement can marginally improve the constraint on parameters that quantify the interacting vacuum, and that the combined dataset favours the ΛCDM at 68% CL. This proof-of-the-concept study demonstrates the potential power of future 21-cm experiments to constrain the interacting dark energy models. ",
keywords = "astro-ph.CO",
author = "Yuting Wang and Gong-Bo Zhao",
note = "6 pages, 5 figures, 1 table; accepted for publication in ApJ",
year = "2018",
month = dec,
day = "7",
doi = "10.3847/1538-4357/aaeb9c",
language = "English",
volume = "869",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - Constraining the dark matter-vacuum energy interaction using the EDGES 21-cm absorption signal

AU - Wang, Yuting

AU - Zhao, Gong-Bo

N1 - 6 pages, 5 figures, 1 table; accepted for publication in ApJ

PY - 2018/12/7

Y1 - 2018/12/7

N2 - The recent measurement of the global 21-cm absorption signal reported by the Experiment to Detect the Global Epoch of Reionization Signature (EDGES) Collaboration is in tension with the prediction of the ΛCDM model at a 3.8σ significance level. In this work, we report that this tension can be released by introducing an interaction between dark matter and vacuum energy. We perform a model parameter estimation using a combined dataset including EDGES and other recent cosmological observations, and find that the EDGES measurement can marginally improve the constraint on parameters that quantify the interacting vacuum, and that the combined dataset favours the ΛCDM at 68% CL. This proof-of-the-concept study demonstrates the potential power of future 21-cm experiments to constrain the interacting dark energy models.

AB - The recent measurement of the global 21-cm absorption signal reported by the Experiment to Detect the Global Epoch of Reionization Signature (EDGES) Collaboration is in tension with the prediction of the ΛCDM model at a 3.8σ significance level. In this work, we report that this tension can be released by introducing an interaction between dark matter and vacuum energy. We perform a model parameter estimation using a combined dataset including EDGES and other recent cosmological observations, and find that the EDGES measurement can marginally improve the constraint on parameters that quantify the interacting vacuum, and that the combined dataset favours the ΛCDM at 68% CL. This proof-of-the-concept study demonstrates the potential power of future 21-cm experiments to constrain the interacting dark energy models.

KW - astro-ph.CO

U2 - 10.3847/1538-4357/aaeb9c

DO - 10.3847/1538-4357/aaeb9c

M3 - Article

VL - 869

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 26

ER -

ID: 11888580