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.accessioned2022-02-04T09:43:40Z
dc.date.available2022-02-04T09:43:40Z
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– Lemaî tre 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–Lemaî tre 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.citationTiwari, P. et al. (2022). Superhorizon perturbations: A possible explanation of the hubble–lemaître tension and the large-scale anisotropy of the universe. Astrophysical Journal Letters, 942(2), L36. 10.3847/2041-8213/ac447aen_US
dc.identifier.issn2041-8213
dc.identifier.uri10.3847/2041-8213/ac447a
dc.identifier.urihttp://hdl.handle.net/10566/7157
dc.language.isoenen_US
dc.publisherIOP Publishingen_US
dc.subjectDark matteren_US
dc.subjectInflationary universeen_US
dc.subjectHubble-Lemaitre lawen_US
dc.subjectHubble constanten_US
dc.titleSuperhorizon perturbations: A possible explanation of the hubble–lemaître tension and the large-scale anisotropy of the universeen_US
dc.typeArticleen_US

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