Cosmic microwave background constraints on extended dark matter objects

Croon, Djuna; Muñoz, Sergio Sevillano

Abstract

Primordially formed extended dark objects would accrete baryonic matter and impact the ionisation history of the Universe. Insisting on consistency with the anisotropies of the cosmic microwave background, we derive constraints on the dark matter fraction for various classes of objects, of different sizes. We introduce a novel scaling technique to speed up numerical calculations and release our calculation framework in the form of a Mathematica notebook. Conservatively, we focus on spherical accretion and collisional ionisation. We find strong constraints limiting the dark matter fraction to subpercent level for objects of up to 104 AU in size.

Citation

Croon, D., & Muñoz, S. S. (2024). Cosmic microwave background constraints on extended dark matter objects. Journal of Cosmology and Astroparticle Physics, 2024(07), Article 060. https://doi.org/10.1088/1475-7516/2024/07/060

• Journal Article Type: Article
• Acceptance Date: Jul 25, 2024
• Online Publication Date: Jul 25, 2024
• Publication Date: Jul 1, 2024
• Deposit Date: Jul 31, 2024
• Publicly Available Date: Aug 1, 2024
• Journal: Journal of Cosmology and Astroparticle Physics
• Electronic ISSN: 1475-7516
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2024
• Issue: 07
• Article Number: 060
• DOI: https://doi.org/10.1088/1475-7516/2024/07/060
• Public URL: https://durham-repository.worktribe.com/output/2641861