Squeezing MOND into a Cosmological Scenario

Details Squeezing MOND into a Cosmological Scenario Squeezing MOND into a Cosmological Scenario

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvl..92m1102l&link_type=abstract

Physical Review Letters, vol. 92, Issue 13, id. 131102

Physics

15

Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Cosmology

Scientific paper

Explaining the effects of dark matter using modified gravitational dynamics (MOND) has for decades been both an intriguing and controversial possibility. By insisting that the gravitational interaction that accounts for the Newtonian force also drives cosmic expansion, one may kinematically identify which cosmologies are compatible with MOND, without explicit reference to the underlying theory so long as the theory obeys Birkhoff’s law. We find that the critical acceleration a0 must have a slight source-mass dependence (a0˜M1/3) and that MOND cosmologies are naturally compatible with observed late-time expansion history. However, cosmologies that can produce enough density perturbations to account for structure formation are contrived and fine tuned. Even then, they may be marginally ruled out by evidence of early (z˜20) reionization.

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