Work

Non-linear cosmological perturbations for coupled dark energy

Year: 2025

Type: article

Abstract: We derive the one-loop perturbation kernels for a minimal modified gravity model in which dark energy is coupled to dark matter via a constant coupling. We derive the time-dependent kernels via analytical and numerical solutions and provide accurate fitting functions. These kernels can be directly employed to test for modified gravity in forthcoming large-scale surveys.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2025/09/001

Authors: Bilal Tüdes, Luca Amendola

Institutions: Heidelberg University, Institute for Theoretical Physics

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Deutsche Forschungsgemeinschaft

Awards: G6526081583, EXC 2181: STRUKTUREN: Emergenz in Natur, Mathematik und komplexen Daten