Fundamental parameter-free solutions in modified gravity

Modified gravity (MOG) has been used successfully to explain the rotation curves of galaxies, the motion of galaxy clusters, the bullet cluster and cosmological observations without the use of dark matter or Einstein's cosmological constant. We now have the ability to demonstrate how these solu...

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Bibliographic Details
Published inClassical and quantum gravity Vol. 26; no. 8; pp. 085002 - 085002 (19)
Main Authors Moffat, J W, Toth, V T
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 21.04.2009
Institute of Physics
Subjects
Exact sciences and technology
General relativity and gravitation
Physics
Spherical symmetry
Rotation curve
Galaxies
Field theories
Homogeneous universe
Action principle
Galaxy clusters
Cosmological constant
Dark matter
Isotropic universe
Numerical solution
Cosmology
Gravity
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Summary:Modified gravity (MOG) has been used successfully to explain the rotation curves of galaxies, the motion of galaxy clusters, the bullet cluster and cosmological observations without the use of dark matter or Einstein's cosmological constant. We now have the ability to demonstrate how these solutions can be obtained directly from the action principle, without resorting to the use of fitted parameters or empirical formulae. We obtain numerical solutions to the theory's field equations that are exact in the sense that no terms are omitted, in two important cases: the spherically symmetric, static vacuum solution and the cosmological case of a homogeneous, isotropic universe. We compare these results to selected astrophysical and cosmological observations.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0264-9381
1361-6382
DOI:10.1088/0264-9381/26/8/085002