Testing modified gravity with globular cluster velocity dispersions

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dc.creatorMoffat, J. W.
dc.creatorToth, V. T.
dc.date2007-08-14
dc.date2008-02-29
dc.date.accessioned2026-07-07T09:44:16Z
dc.date.available2026-07-07T09:44:16Z
dc.descriptionGlobular clusters (GCs) in the Milky Way have characteristic velocity dispersions that are consistent with the predictions of Newtonian gravity, and may be at odds with Modified Newtonian Dynamics (MOND). We discuss a modified gravity (MOG) theory that successfully predicts galaxy rotation curves, galaxy cluster masses and velocity dispersions, lensing, and cosmological observations, yet produces predictions consistent with Newtonian theory for smaller systems, such as GCs. MOG produces velocity dispersion predictions for GCs that are independent of the distance from the galactic center, which may not be the case for MOND. New observations of distant GCs may produce strong criteria that can be used to distinguish between competing gravitational theories.
dc.description4 pages, 2 figures; accepted for publication in ApJ
dc.identifierhttps://arxiv.org/abs/0708.1935
dc.identifierhttp://arxiv.org/abs/0708.1935
dc.identifierThe Astrophysical Journal, 680:1158-1161, 2008 June 20
dc.identifierdoi:10.1086/587926
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/162810
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleTesting modified gravity with globular cluster velocity dispersions
dc.typetext

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