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A general class of gravitational theories as alternatives to dark matter where the speed of gravity always equals the speed of light

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arxiv 1905.09465 v1 pith:BTQXFH7N submitted 2019-05-23 gr-qc astro-ph.CO

Constantinos Skordis , Tom Zlosnik This is my paper · ORCID
classification gr-qcastro-ph.CO
keywords speedgravitylighttheoriesalwaysclassdarkequals
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A number of theories of gravity have been proposed as proxies for dark matter in the regime of galaxies and cosmology. The recent observations of gravitational waves (GW170817) from the merger of two neutron stars, followed by an electromagnetic counterpart (GW170817a) have placed stringent constraints on the difference of the speed of gravity to the speed of light, severely restricting the phenomenological viability of such theories. We revisit the impact of these observations on the Tensor-Vector-Scalar (TeVeS) paradigm of relativistic Modified Newtonian Dynamics (MOND) and demonstrate the existence of a previously unknown class of this paradigm where the speed of gravity always equals the speed of light. We show that this holds without altering the usual (bimetric) MOND phenomenology in galaxies.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 64 citations worldwide. Full citation record

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  3. Baryonic mass budgets in the central regions of the Bullet Cluster and their consistency with strong lensing in MOND

    astro-ph.GA 2026-06 unverdicted novelty 6.0 of 10

    MOND strong-lensing masses in the Bullet Cluster’s three BCG cores lie between lower and upper IGIMF baryonic mass estimates from JWST photometry.

  4. Bridging the gap between dark matter and MOND by a relativistc scalar field approach

    gr-qc 2025-10 conditional novelty 6.0 of 10

    A single relativistic scalar field with a Bekenstein-type kinetic term and a mass-generating term reproduces deep-MOND acceleration in the weak-field limit and predicts stronger-than-MOND light bending.

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