A local infall from a cosmographic analysis of Pantheon+

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.

19 pages, 12 figures

References in corpus (6)

• The Pantheon+ Analysis: Cosmological Constraints
• The Pantheon+ Analysis: Improving the Redshifts and Peculiar Velocities of Type Ia Supernovae Used in Cosmological Analyses
• On the homogeneity of SnIa absolute magnitude in the Pantheon+ sample
• An effective description of Laniakea: impact on cosmology and the local determination of the Hubble constant
• Bulk Flow Motion Detection in the Local Universe with Pantheon$+$ Type Ia Supernovae
• Approximations for the divergence of the local large-scale structure velocity field and its implications for Tilted Cosmology

Cited by in corpus (7)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Anisotropy in Pantheon+ supernovae
• Alleviating the Hubble Tension with a Local Void and Transitions of the Absolute Magnitude
• Dipolar fluence distribution of statistically isotropic FERMI gamma-ray bursts
• Anchors no more: Using peculiar velocities to constrain $H_0$ and the primordial Universe without calibrators
• Cosmic Dipoles from Large-Scale Structure Surveys
• An effective $\mathbf{\Lambda }$-Szekeres modelling of the local Universe with Cosmicflows-4