Modifying gravity with the aether : An alternative to dark matter

By T. Złośnik, Pedro G. Ferreira, Glenn Starkman. 2006

243 citations recorded by the source corpus.

There is evidence that Newton and Einstein's theories of gravity cannot explain the dynamics of a universe made up solely of baryons and radiation. To be able to understand the properties of galaxies, clusters of galaxies and the universe on the whole it has become commonplace to invoke the presence of dark matter. An alternative approach is to modify the gravitational field equations to accommodate observations. We propose a new class of gravitational theories in which we add a new degree of freedom, the Aether, in the form of a vector field that is coupled covariantly, but nonminimally, with the space-time metric. We explore the Newtonian and non-Newtonian limits, discuss the conditions for these theories to be consistent and explore their effect on cosmology.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/83fbe696391fdcc2f76f9b7d0b11611ee2736bbb

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Citations in the corpus

Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions (2011, methodology): “[514] was then that a similar, but simpler, modification of gravity could be obtained by devising a simple tensor-vector theory in the matter frame, with no a priori on the geometry of the physical metric.”
Einstein-æther gravity: a status report (2008, background): “Related vector-tensor gravity theories are that of Kostelecky and Samuel [8] which corresponds to the Maxwell-like special case of æ-theory (c3 =−c1, c2 = c4 = 0), both with a fixed norm and with a symmetry breaking potential for the vector, of Gripaios [9] which has all two-derivative terms and a s”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, background): “A family of covariant actions for the clock field is as follows (Zlosnik et al. 2007):”
Galaxies as simple dynamical systems: observational data disfavor dark matter and stochastic star formation (2014, background): “Another generalization has been published in 2007 by Zlosnik [49] The generalizations which are already known to account for the observed dynamics on galaxy scales without cold or warm dark matter need to pass all experimental tests.”
Local-Group tests of dark-matter concordance cosmology - Towards a new paradigm for structure formation (2010, methodology): “Theoretical approaches trying to embed MOND within a Lorentz-covariant framework (Bekenstein 2004; Sanders 2005; Zlosnik et al. 2007; Zhao 2008; Bruneton & Esposito-Farèse2008; Blanchet & Le Tiec 2009; Esposito-Farèse 2009; Skordis 2009; Milgrom 2009b) are currently under intense scrutiny, and a…”