By Salvatore Capozziello (auth.), Claudia Moreno González, José Edgar Madriz Aguilar, Luz Marina Reyes Barrera (eds.)
Proceedings from the 2012 Fourth overseas assembly on Gravitation and Cosmology, targeting speeded up cosmic expansion
This quantity presents either an replace and a assessment of the nation of different theories of gravity in reference to the speeded up enlargement of the universe factor. diverse theoretical proposals exist to give an explanation for the acceleration within the cosmic enlargement, producing the darkish power factor and establishing the prospect to theories of gravity substitute to basic relativity. comparable concerns similar to the darkish topic challenge also are surveyed which will provide the readers profound perception at the topic from various issues of view. constituted of brief talks and plenary lectures given by means of top specialists within the box, a few of them with exceptional and old contributions, the ebook permits the reader to discover readable and referenced surveys in themes like f(R) theories, the darkish subject and darkish power concerns, converted Newtonian Dynamics (MOND) situations, f(T) theories, scalar-tensor theories derived from non-Riemannian geometries, emergent universes, the cosmological consistent and different subject matters of present curiosity for more youthful and senior physicists and graduate scholars.
These court cases are from the Fourth foreign assembly on Gravitation and Cosmology, held in Guadalajara, Jalisco, México, from 20 - 25 may perhaps, 2012, was once backed via ICTP- Trieste, Italy and COECyTJAL-Universidad de Guadalajara, México. This occasion is a chain of clinical conferences begun in 2004 in Cuba, concentrating on present and chosen themes within the fields of gravitation and cosmology.
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Extra resources for Accelerated Cosmic Expansion: Proceedings of the Fourth International Meeting on Gravitation and Cosmology
D. Bekenstein, arXiv:grqc/9605059. 60. P. Sotiriou, V. Faraoni, Phys. Rev. Lett. 108, 081103 (2012) 61. N. Bocharova, K. Bronnikov, V. Melnikov, Vestn. Mosk. Univ. Fiz. Astron. A. N. Kireyev, Phys. Lett. A 67, 95 (1978) Chapter 3 A Geometrical Approach to Brans-Dicke Theory M. L. Pucheu, T. S. Almeida and C. Romero Abstract We consider an approach to Brans-Dicke theory of gravity in which the scalar field is considered as a geometrical field. By postulating the Palatini variation, we find out that the role played by the scalar field consists of turning the space-time geometry into a Weyl integrable manifold.
24) and from a redefinition of the scalar field, namely ϕ = 2ωφ, we conclude that our theory in the Weyl frame mapped by Weyl transformation into the Riemann frame leads to Einstein’s theory of gravity minimally coupled to a massless scalar field. 26) and where ¯ is the d’Alembertian operator calculated using the Christoffel symbols with respect to γμν . 1 Experimental Tests on the Solar System Here, we will briefly examine the classical tests in the solar system for the BransDicke type theory when the description of the space-time is given by a Weyl integrable manifold.
20) leads to the affine geodesic equations with the connection coefficients given by Eq. 6) (of course, in the case of general relativity the scalar field φ does not appear in the equations). Therefore, since the world lines of the fluid particles are geodesics and because they are not interacting with each other we can infer that the world line of a single free particle is a geodesic. 3 A Geometrical Approach to Brans-Dicke Theory 39 achieve a Riemann frame, namely a frame in which we have φ¯ = 0.