Lightening the dark matter from its viscosity and explanation of EDGES anomaly

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dc.contributor.author Mishra, Arvind Kumar
dc.date.accessioned 2020-06-19T04:57:13Z
dc.date.available 2020-06-19T04:57:13Z
dc.date.issued 2020-05
dc.identifier.citation Mishra, Arvind Kumar, "Lightening the dark matter from its viscosity and explanation of EDGES anomaly", Journal of Cosmology and Astroparticle Physics, DOI: 10.1088/1475-7516/2020/05/034, vol. 2020, no. 5, pp.034-034, May 2020. en_US
dc.identifier.issn 1475-7516
dc.identifier.uri https://doi.org/10.1088/1475-7516/2020/05/034
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5481
dc.description.abstract In this work, we study the visible photon production from the viscous dissipation of the dark matter (DM) fluid. The generation of visible photons depends on the magnitude of the dark matter viscosity and becomes important at the late time. We argue that for sufficiently large dark matter viscosity, the number of resonantly converted visible photons becomes large which populates the Rayleigh-Jeans (RJ) tail of the Cosmic Microwave Background (CMB) radiation. Consequently, these excess visible photons can explain the anomaly in the 21 cm signal observed by the EDGES collaboration. Further, we explore the parameter space for which the 21 cm signal can provide the region to probe the dark radiation and the DM viscosity.
dc.description.statementofresponsibility by Arvind Kumar Mishra
dc.format.extent vol. 2020, no. 5, pp.034-034
dc.language.iso en_US en_US
dc.publisher IOP Publishing en_US
dc.title Lightening the dark matter from its viscosity and explanation of EDGES anomaly en_US
dc.type Article en_US
dc.relation.journal Journal of Cosmology and Astroparticle Physics


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