2017/02/02 by Tom Złośnik, Thomas Złośnik, Constantinos Skordis
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Friedmann–Lemaître–Robertson–Walker metric #Galaxy #Galaxy rotation curve #General relativity #Gravitation #Mathematical physics #Modified Newtonian dynamics #Newtonian potential #Noncommutative and Quantum Gravity Theories #Phenomenology (philosophy) #Philosophy #Physics #Theoretical physics #astro-ph.CO #gr-qc
paper · pdf · doi:10.1103/physrevd.95.124023
published as Phys. Rev. D 95, 124023 (2017)
arxiv created 2017/02/02 · openalex created_date 2017/02/17 · openalex publication_date 2017/06/14 · arxiv updated 2017/06/21 · openalex updated_date 2026/08/05
A generalization of Bekenstein's Tensor-Vector-Scalar (TeVeS) model of modified gravity has recently been proposed as an alternative to dark matter. This model---which we will refer to as g-TeVeS---utilizes a Galileon-induced Vainshtein mechanism to suppress modifications to General Relativity in strong gravity regimes and so avoids the need to introduce the baroque kinetic terms that typically exist in relativistic models of modified Newtonian dynamics (MOND). We explore the behavior of this model in spacetimes with exact Friedmann-Robertson-Walker (FRW) symmetry. The ability of the theory to recover MOND phenomenology places restrictions on the theory's parameter space and it is found that within an estimate of this area of parameter space the theory cannot successfully approximate the Friedmannian cosmological behavior of cold dark matter. It is found that much closer agreement may be recovered in other regions of the theory's parameter space and the reasons for this are discussed.