The price of abandoning dark matter is nonlocality

We consider the classic question posed by Pardo and Spergel about the price of abandoning dark matter in the context of an invariant, metric-based theory of gravity. Our answer is that the price is nonlocality. This has been known for some time in the context of the quasi-static regime. We show that...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2024-05, Vol.2024 (5), p.42
Main Authors: Deffayet, C., Woodard, R.P.
Format: Article
Language:English
Subjects:
Astrophysics
Context
Cosmic microwave background
cosmological perturbation theory
Dark matter
dark matter theory
General Relativity and Quantum Cosmology
Gravitation theory
High Energy Physics - Theory
modified gravity
Physics
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Summary:We consider the classic question posed by Pardo and Spergel about the price of abandoning dark matter in the context of an invariant, metric-based theory of gravity. Our answer is that the price is nonlocality. This has been known for some time in the context of the quasi-static regime. We show that it also applies for cosmology and we exhibit a model which reproduces standard CDM successes such as perturbations in the cosmic microwave background, baryon acoustic oscillations and structure formation.
ISSN:1475-7516
1475-7508
1475-7516
DOI:10.1088/1475-7516/2024/05/042