Scalar–tensor–vector gravity theory

By J. W. Moffat. 2005

652 citations recorded by the source corpus.

A covariant scalar–tensor–vector gravity theory is developed which allows the gravitational constant G, a vector field coupling ω and the vector field mass μ to vary with space and time. The equations of motion for a test particle lead to a modified gravitational acceleration law that can fit galaxy rotation curves and cluster data without non-baryonic dark matter. The theory is consistent with solar system observational tests. The linear evolutions of the metric, vector field and scalar field perturbations and their consequences for the observations of the cosmic microwave background are investigated.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/1be54a3e466c6143794a63067ce1abe3e828b154

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Pavel Kroupa
2. M. Pawlowski
3. S. McGaugh
4. B. Famaey
5. Justin I. Read
6. O. Agertz
7. J. Brownstein
8. J. W. Moffat

Citations in the corpus

• Einstein-æther gravity: a status report (2008, background): “Other theories involving scalar fields in addition to a vector field with a Maxwell-like action for the vector are Bekenstein’s TeVeS [13] and Moffat’s STVG [14].”
• Disformal invariance of second order scalar-tensor theories: Framing the Horndeski action (2013, background): “To name a ∗E-mail: bettoni@sissa.it †E-mail: liberati@sissa.it few, f(R) theories of gravity [4], generalise Scalar-Tensor theories [5], TeVeS [6] and MOND [7–9] (see also [10] and references therein for a thorough presentation).”
• The MOG weak field approximation – II. Observational test of Chandra X-ray clusters (2013, methodology): “The action of STVG is composed of scalar, tensor and vector fields (Moffat 2006):”
• Local-Group tests of dark-matter concordance cosmology - Towards a new paradigm for structure formation (2010, background): “It is noteworthy that a formulation of MOG in terms of scalar, vector, and tensor fields (Moffat 2006) may possibly hint at a convergence with the Bekenstein (2004) tensor-vector-scalar theory of gravity.”
• Stellar structure models in modified theories of gravity: Lessons and challenges (2019, background): “[157] several modified theories of gravity are constrained, including f (R), the fourth-order gravity studied by Stelle [158], and scalar-vector-tensor gravity [159].”
• The MOG weak field approximation and observational test of galaxy rotation curves (2013, methodology): “The predictions of MOG for the rotation curves of galaxies have been compared to the data (Brownstein & Moffat 2006a; Brownstein 2009 ), using a static spherically symmetric point mass solution derived from the field equations.”
• The Dark Matter Crisis: Falsification of the Current Standard Model of Cosmology (2012, background): “Another alternative, Modified Gravity (MOG) (e.g. Moffat 2006; Moffat & Toth 2009b) has been suggested and eliminates all need for DM and DE.”
• Dynamical systems applied to cosmology: Dark energy and modified gravity (2017, methodology): “In the context of Modified Gravity models (MOG), Moffat (2006) and Jamali & Roshan (2016) studied the cosmology of a scalar-vector-tensor theory.”
• Understanding the shape and diversity of dwarf galaxy rotation curves in ΛCDM (2016, background): “Such simulations predict central dark matter density profiles that rise as ρ ∼ r−1 (a ‘cusp’; Dubinski & Carlberg 1 An alternative explanation is to modify weak-field gravity (e.g. Milgrom 1983; Bekenstein 2004; Moffat 2006).”
• THE BARYONIC TULLY–FISHER RELATION OF GAS-RICH GALAXIES AS A TEST OF ΛCDM AND MOND (2011, background): “In a broader context, it provides a useful test of theories that seek to modify gravity in order to obviate the need for dark matter (e.g., Milgrom 1983; Sanders 1984; Mannheim & Kazanas 1989; Moffat 2006).”
• Modified Gravity and Cosmology (2011, background): “Hence, the author of [905] has posited a certain number of scaling relations that translate into spatial dependences for G, ω and μ.”
• The Bullet Cluster 1E0657-558 evidence shows modified gravity in the absence of dark matter (2007, methodology): “…gravitational coupling – in the infrared (IR) at astrophysical scales – which has successfully been applied to galaxy rotation curves (Brownstein and Moffat, 2006b), X-ray cluster masses (Brownstein and Moffat, 2006a), and is within limits set by solar system observations (Brownstein and…”