Superhorizon Perturbations: A Possible Explanation of the Hubble–Lemaître Tension and the Large-scale Anisotropy of the Universe.

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dc.contributor.authorTiwari, Prabhakar
dc.contributor.authorKothari, Rahul
dc.contributor.authorJain, Pankaj
dc.date.accessioned2022-02-24T08:23:42Z
dc.date.available2022-02-24T08:23:42Z
dc.date.issued2022
dc.description.abstractCurrent cosmological observations point to a serious discrepancy between the observed Hubble parameter obtained using direct versus cosmic microwave background radiation measurements. Besides this so-called Hubble– Lemaître tension, we also find considerable evidence in diverse cosmological observables that indicate violation of the cosmological principle. In this paper, we suggest that both these discrepancies are related and can be explained by invoking superhorizon perturbations in the universe. We implement this by considering a single superhorizon mode and showing that it leads to both a dipole in large-scale structures and a shift in the Hubble–Lemaître parameter. Furthermore, the shift is found to be independent of redshift up to a certain distance. This is nicely consistent with the data.en_US
dc.identifier.urihttps://doi.org/10.3847/2041-8213/ac447a
dc.identifier.urihttp://hdl.handle.net/10566/7295
dc.language.isoenen_US
dc.publisherThe American Astronomical Society.en_US
dc.subjectSuperhorizon Perturbationsen_US
dc.subjectHubble–Lemaître Tensionen_US
dc.subjectLarge-scale Anisotropyen_US
dc.subjectCosmological observationsen_US
dc.subjectDark matteren_US
dc.subjectHubble-Lemaitre lawen_US
dc.titleSuperhorizon Perturbations: A Possible Explanation of the Hubble–Lemaître Tension and the Large-scale Anisotropy of the Universe.en_US
dc.typeArticleen_US

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