Light bending in F[g(□)R] extended gravity theories
We show that in the weak field limit the light deflection alone cannot distinguish between different R+F[g(□)R] models of gravity, where F and g are arbitrary functions. This does not imply, however, that in all these theories an observer will see the same deflection angle. Owed to the need to calib...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-05-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318301667 |
| _version_ | 1811206102385164288 |
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| author | Breno L. Giacchini Ilya L. Shapiro |
| author_facet | Breno L. Giacchini Ilya L. Shapiro |
| author_sort | Breno L. Giacchini |
| collection | DOAJ |
| description | We show that in the weak field limit the light deflection alone cannot distinguish between different R+F[g(□)R] models of gravity, where F and g are arbitrary functions. This does not imply, however, that in all these theories an observer will see the same deflection angle. Owed to the need to calibrate the Newton constant, the deflection angle may be model-dependent after all necessary types of measurements are taken into account. Keywords: Higher derivative gravity, Light bending, Brans–Dicke theory, Non-local gravity, Scalar–tensor theories |
| first_indexed | 2024-04-12T03:42:11Z |
| format | Article |
| id | doaj.art-891d5e096be544f3971859ecdeb1b2ed |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-12T03:42:11Z |
| publishDate | 2018-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-891d5e096be544f3971859ecdeb1b2ed2022-12-22T03:49:15ZengElsevierPhysics Letters B0370-26932018-05-017805460Light bending in F[g(□)R] extended gravity theoriesBreno L. Giacchini0Ilya L. Shapiro1Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Urca, 22290-180, Rio de Janeiro, RJ, Brazil; Corresponding author.Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Universitário – Juiz de Fora, 36036-900, MG, Brazil; Tomsk State Pedagogical University, Tomsk, 634041, Russia; Tomsk State University, Tomsk, 634050, RussiaWe show that in the weak field limit the light deflection alone cannot distinguish between different R+F[g(□)R] models of gravity, where F and g are arbitrary functions. This does not imply, however, that in all these theories an observer will see the same deflection angle. Owed to the need to calibrate the Newton constant, the deflection angle may be model-dependent after all necessary types of measurements are taken into account. Keywords: Higher derivative gravity, Light bending, Brans–Dicke theory, Non-local gravity, Scalar–tensor theorieshttp://www.sciencedirect.com/science/article/pii/S0370269318301667 |
| spellingShingle | Breno L. Giacchini Ilya L. Shapiro Light bending in F[g(□)R] extended gravity theories Physics Letters B |
| title | Light bending in F[g(□)R] extended gravity theories |
| title_full | Light bending in F[g(□)R] extended gravity theories |
| title_fullStr | Light bending in F[g(□)R] extended gravity theories |
| title_full_unstemmed | Light bending in F[g(□)R] extended gravity theories |
| title_short | Light bending in F[g(□)R] extended gravity theories |
| title_sort | light bending in f g □ r extended gravity theories |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318301667 |
| work_keys_str_mv | AT brenolgiacchini lightbendinginfgrextendedgravitytheories AT ilyalshapiro lightbendinginfgrextendedgravitytheories |