Modified gravity with arbitrary coupling between matter and geometry
| dc.creator | Harko, T. | |
| dc.date | 2008-10-04 | |
| dc.date | 2008-10-25 | |
| dc.date.accessioned | 2026-07-07T13:17:40Z | |
| dc.date.available | 2026-07-07T13:17:40Z | |
| dc.description | The field equations of a generalized $f(R)$ type gravity model, in which there is an arbitrary coupling between matter and geometry, are obtained. The equations of motion for test particles are derived from a variational principle in the particular case in which the Lagrange density of the matter is an arbitrary function of the energy-density of the matter only. Generally, the motion is non-geodesic, and takes place in the presence of an extra force orthogonal to the four-velocity. The Newtonian limit of the model is also considered. The perihelion precession of an elliptical planetary orbit in the presence of an extra force is obtained in a general form, and the magnitude of the extra gravitational effects is constrained in the case of a constant extra force by using Solar System observations. | |
| dc.description | 12 pages, no figures, accepted for publication in PLB. Some further references added | |
| dc.identifier | https://arxiv.org/abs/0810.0742 | |
| dc.identifier | http://arxiv.org/abs/0810.0742 | |
| dc.identifier | Phys.Lett.B669:376-379,2008 | |
| dc.identifier | doi:10.1016/j.physletb.2008.10.007 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/231187 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Modified gravity with arbitrary coupling between matter and geometry | |
| dc.type | text |