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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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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Woodard, R.P.
description 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.
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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
title The price of abandoning dark matter is nonlocality
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