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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| Published in | Classical and quantum gravity Vol. 26; no. 8; pp. 085002 - 085002 (19) |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Bristol
IOP Publishing
21.04.2009
Institute of Physics |
| Subjects | |
| Online Access | Get full text |
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| Abstract | 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. |
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| AbstractList | 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. |
| Author | Moffat, J W Toth, V T |
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| Cites_doi | 10.1007/BF00647424 10.1088/1475-7516/2006/03/004 10.1088/1475-7516/2005/05/003 10.1146/annurev.nucl.53.041002.110503 10.1016/0003-4916(77)90202-0 10.1111/j.1365-2966.2006.09996.x 10.1103/PhysRev.124.925 10.1086/338753 10.1086/498208 10.1086/587926 10.1111/j.1365-2966.2007.12275.x |
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| Keywords | 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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| References | Moffat J W Toth V T (3) 2007 11 Reiprich T H (17) 2002; 567 12 Moffat J W (13) 2004 18 Moffat J W Toth V T (8) 2009 Richtler T Schuberth Y Hilker M Dirsch B Bassino L Romanowsky A J (16) 2007 Brownstein J R (6) 2006; 636 Moffat J W Toth V T (10) 2008 2 4 5 Moffat J W Toth V T (7) 2007 Moffat J W (14) 2005; 2005 Moffat J W (1) 2006; 2006 Tully R B (15) 1977; 54 Moffat J W (9) 2008; 680 |
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| Title | Fundamental parameter-free solutions in modified gravity |
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