Work

Gravitational Instability of Cold Axion Dark Matter Beyond Minimal Coupling

Year: 2026

Type: preprint

Abstract: Following recent observations of unexpectedly massive galaxies at high redshift by the James Webb Space Telescope, the revision of Dark Matter (DM) models --specifically regarding how DM couples to gravity-- has become a central topic in Cosmology. In this paper, we develop an axion model for Cold Dark Matter (CDM) with a non-minimal coupling to gravity. From this framework, we evaluate the gravitational instability in the hydrodynamic limit. Our results demonstrate how gravitational instabilities depend on the non-minimal coupling parameter, providing a novel tool for aligning with the high-redshift observations from the James Webb Space Telescope.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.25984

Authors: Cordero-Patino, Bryan, Duenas-Vidal, Álvaro, Segovia, Jorge

Institutions: Universidad de Zaragoza, Centro de Astropartículas y Física de Altas Energías, National Polytechnic School, Universidad Pablo de Olavide

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Junta de Andalucía, Agencia Estatal de Investigación

Awards: G2436853696, G5108960557, G5112260952

OpenAlex ID: W7223044953

Cites: 16

Cited by:

Related to: 10