paper

A local infall from a cosmographic analysis of Pantheon+

arXiv:2407.07002 · doi:10.1088/1475-7516/2024/12/003

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 $R ≃ 120 h^{- 1}$ Mpc.

19 pages, 12 figures