Dark matter -- particles or modified gravity?

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Discussion Overview

The discussion revolves around the nature of dark matter, specifically debating whether it is best explained by the existence of new particles or by modifications to gravitational theories. The scope includes theoretical perspectives and alternative models related to dark matter.

Discussion Character

  • Debate/contested, Theoretical exploration

Main Points Raised

  • Some participants assert that most evidence for dark matter supports a particle-like origin, citing numerous arguments against modified gravity theories like MOND.
  • Others mention that MOND/TeVeS is not the only alternative to dark matter, introducing concepts such as Mimetic Dark Matter as a potential alternative.
  • A participant references the significance of the Bullet Cluster as evidence related to dark matter, suggesting it supports the particle hypothesis.

Areas of Agreement / Disagreement

Participants express differing views on the nature of dark matter, with no consensus reached on whether it is best explained by new particles or modified gravity theories. Multiple competing models are presented.

Contextual Notes

Some arguments rely on specific interpretations of evidence, and the discussion includes references to various theoretical frameworks without resolving the underlying assumptions or mathematical complexities involved.

copernicus1
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What is the evidence for dark matter being new particles as opposed to some modified form of gravity?
 
Physics news on Phys.org
Most of the evidence for Dark matter and all arguments against MOND suggest a particle-like origin. The list is too long to explain every point in detail here. Do you have more specific questions?
 
MOND/TeVeS is not the only alternative to real dark matter.

For example Mimetic Dark Matter may gain some echo in the next months
http://arxiv.org/abs/1308.5410
 

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