2011/12/06 by Scott Dodelson · 1 voice · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #hep-ph
paper · pdf · doi:10.1142/s0218271811020561
6 pages, 1 figure, Honorable Mention, Gravity Research Foundation 2011 Awards
arxiv created 2011/12/06 · arxiv updated 2011/12/07 · openalex publication_date 2011/12/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Gravitational potentials in the cosmos are deeper than expected from observed visible objects, a phenomenon usually attributed to dark matter, presumably in the form of a new fundamental particle. Until such a particle is observed, the jury remains out on dark matter, and modified gravity models must be considered. The class of models reducing to modified Newtonian dynamics (MOND) in the weak field limit does an excellent job fitting the rotation curves of galaxies, predicting the relation between baryonic mass and velocity in gas-dominated galaxies, and explaining the properties of the local group. Several of the initial challenges facing MOND have been overcome, while others remain. Here we point out the most severe challenge facing MOND.