Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-30
Phys.Rev.Lett.92:131102,2004
Astronomy and Astrophysics
Astrophysics
11 pages revtex, 2 figures
Scientific paper
10.1103/PhysRevLett.92.131102
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. Using this technique, we are able to self-consistently compute a number of quantities of cosmological interest. We find that the critical acceleration a_0 must have a slight source-mass dependence (a_0 ~ M^(1/3)) and that MOND cosmologies are naturally compatible with observed late-time expansion history and the contemporary cosmic acceleration. 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.
Lue Arthur
Starkman Glenn D.
No associations
LandOfFree
Squeezing MOND into a Cosmological Scenario does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Squeezing MOND into a Cosmological Scenario, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Squeezing MOND into a Cosmological Scenario will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-483854