Alternatives to dark matter: Modified gravity as an alternative to dark matter

Abstract

The premier alternative to the dark matter paradigm is modified gravity. Following an introduction to the relevant phenomenology of galaxies, I review the MOND paradigm, an effective summary of the observations which any theory must reproduce. A simple nonlinear modified gravity theory does justice to MOND at the nonrelativistic level, but cannot be elevated to the relativistic level in a unique way. I go in detail into the covariant tensor-vector-theory (TeVeS) which not only recovers MOND but can also deal in detail with gravitational lensing and cosmology. Problems with MOND and TeVeS at the level of clusters of galaxies are given attention. I also summarize the status of TeVeS cosmology.

20 pages, 4 figures

References in corpus (3)

• Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222
• Weak Lensing Probes of Modified Gravity
• The mass missing problem in clusters: dark matter or modified dynamics?

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• On the radial acceleration of disk galaxies
• Machian gravity and a cosmology without dark matter and dark energy
• The Concept of an Emergent Cosmographic Vacuum