σ8 Discrepancy and its solutions

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dc.contributor.author Mohanty, Subhendra
dc.contributor.author Anand, Sampurn
dc.contributor.author Chaubal, Prakrut
dc.contributor.author Mazumdar, Arindam
dc.contributor.author Parashari, Priyank
dc.date.accessioned 2018-09-05T12:48:14Z
dc.date.available 2018-09-05T12:48:14Z
dc.date.issued 2018-08
dc.identifier.citation Mohanty, Subhendra; Anand, Sampurn; Chaubal, Prakrut; Mazumdar, Arindam and Parashari, Priyank, σ8 Discrepancy and its solutions, Journal of Astrophysics and Astronomy, DOI: 10.1007/s12036-018-9543-4, vol. 39, no.4, Aug. 2018. en_US
dc.identifier.issn 0250-6335
dc.identifier.issn 0973-7758
dc.identifier.uri https://doi.org/10.1007/s12036-018-9543-4
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/3890
dc.description.abstract In the recent past, measurements of ?8 from large scale structure observations have shown some discordance with its value obtained from Planck CMB within the ? CDM frame. This discordance naturally leads to a mismatch in the value of H0 also. Under the presumption that these discordances are not due to systematics, several attempts have been made to ameliorate the tensions. In this article, we describe the methods of determination of ?8 from large scale as well as CMB observations. We discuss that these discrepancies vanish if we consider the energy momentum tensor for an imperfect fluid which could arise due to self-interaction of dark matter or in an effective description of large scale structure. We demonstrate how the presence of viscosities in cold dark fluid on large scales ameliorate the problem elegantly than other solutions. We also estimate the neutrino mass in the viscous cosmological setup.
dc.description.statementofresponsibility by Subhendra Mohanty, Sampurn Anand, PrakrutChaubal, Arindam Mazumdar and Priyank Parashari
dc.format.extent vol. 39, no.4
dc.language.iso en en_US
dc.publisher Springer en_US
dc.subject CMB en_US
dc.subject large scale structure en_US
dc.subject viscosity en_US
dc.subject neutrino mass en_US
dc.title σ8 Discrepancy and its solutions en_US
dc.type Article en_US
dc.relation.journal Journal of Astrophysics and Astronomy


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