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A local infall from a cosmographic analysis of Pantheon+
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abstract
We present a model independent analysis of the Pantheon+ supernova sample and study the dependence of the recovered values of $H_0$, $q_0$ and $j_0$ on the redshift cut and on the modeling of peculiar velocities. In addition to the bulk velocity discussed previously, we also find a significant infall that we attribute to the presence of an overdensity out to a radius of $R\simeq 120h^{-1}$Mpc.
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Cited by 3 Pith papers
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Anisotropy in Pantheon+ supernovae
A maximum-likelihood analysis of Pantheon+ supernovae finds a statistically significant dipole in the local Hubble expansion rate and in the deceleration parameter, which the authors interpret as evidence against a co...
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Alleviating the Hubble Tension with a Local Void and Transitions of the Absolute Magnitude
Deep LTB void models with two or three distance-dependent jumps in the supernova absolute magnitude fit Pantheon+ and Planck data well and push the inferred local Hubble constant toward the SH0ES value.
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Redshift Dependence of $H_0$ Dipole in Pantheon+ Supernovae
A dipole in the locally measured Hubble constant appears at 2-3 sigma in the lowest-redshift Pantheon+ supernova bins, points near the Shapley supercluster and CMB dipole, and disappears for higher redshift thresholds.
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