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Title: Modifying gravity with the aether: An alternative to dark matter

Abstract

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.

Authors:
;  [1];  [1];  [2]
  1. Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom)
  2. (United States)
Publication Date:
OSTI Identifier:
21011082
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.75.044017; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; COSMOLOGY; COUPLING; DEGREES OF FREEDOM; GALAXY CLUSTERS; GRAVITATION; GRAVITATIONAL FIELDS; METRICS; NONLUMINOUS MATTER; QUANTUM FIELD THEORY; SPACE-TIME; UNIVERSE; VECTOR FIELDS

Citation Formats

Zlosnik, T. G, Ferreira, P. G, Starkman, G. D., and Department of Physics, Case-Western Reserve University, Cleveland, Ohio. Modifying gravity with the aether: An alternative to dark matter. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.044017.
Zlosnik, T. G, Ferreira, P. G, Starkman, G. D., & Department of Physics, Case-Western Reserve University, Cleveland, Ohio. Modifying gravity with the aether: An alternative to dark matter. United States. doi:10.1103/PHYSREVD.75.044017.
Zlosnik, T. G, Ferreira, P. G, Starkman, G. D., and Department of Physics, Case-Western Reserve University, Cleveland, Ohio. Thu . "Modifying gravity with the aether: An alternative to dark matter". United States. doi:10.1103/PHYSREVD.75.044017.
@article{osti_21011082,
title = {Modifying gravity with the aether: An alternative to dark matter},
author = {Zlosnik, T. G and Ferreira, P. G and Starkman, G. D. and Department of Physics, Case-Western Reserve University, Cleveland, Ohio},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.75.044017},
journal = {Physical Review. D, Particles Fields},
number = 4,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}