Work

A local infall from a cosmographic analysis of Pantheon+

Year: 2024

Type: article

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 ≃ 120h -1Mpc.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2024/12/003

Authors: Francesco Sorrenti, Ruth Durrer, Martin Kunz

Institution: University of Geneva

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,135

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Université de Genève