English

Determining Cosmology for a Nonlocal Realization of MOND

General Relativity and Quantum Cosmology 2016-11-11 v2 Cosmology and Nongalactic Astrophysics High Energy Physics - Theory

Abstract

We numerically determine the cosmological branch of the free function in a nonlocal metric-based modification of gravity which provides a relativistic generalization of Milgrom's Modified Newtonian Dynamics. We are able to reproduce the Λ\LambdaCDM expansion history over virtually all of cosmic history, including the era of radiation domination during Big Bang Nucleosynthesis, the era of matter domination during Recombination, and most of the era of vacuum energy domination. The very late period of 0z<0.08800 \leq z < 0.0880, during which the model deviates from the Λ\LambdaCDM expansion history, is interesting because it causes the current value of the Hubble parameter to be about 4.5\% larger than it would be for the Λ\LambdaCDM model. This may resolve the tension between inferences of H0H_0 which are based on data from large redshift and inferences based on Hubble plots.

Keywords

Cite

@article{arxiv.1608.07858,
  title  = {Determining Cosmology for a Nonlocal Realization of MOND},
  author = {M. Kim and M. H. Rahat and M. Sayeb and L. Tan and R. P. Woodard and B. Xu},
  journal= {arXiv preprint arXiv:1608.07858},
  year   = {2016}
}

Comments

24 pages, 11 figures, uses LaTeX2e, version 2 revised slightly for publication