What does this research mean for the field?

RCD satisfies the gravitational wave speed constraint from GW170817, with the tensor mode propagating at the speed of light. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

This research aims to explore the compliance of gravitational wave speed constraints derived from the GW170817 event.

March 3, 2026Open Access

GW170817 Constraints and Causal Structure

Key Points

This research aims to explore the compliance of gravitational wave speed constraints derived from the GW170817 event.
Analyzed the propagation of tensor and scalar modes under the disformal action framework.
Assessed the gravitational wave speed constraint |c_T - c|/c < 1e-15.
Considered minimal disformal action and its implications under kinetic completion B'.
Confirmed that tensor mode propagation matches the speed of light (c_T = c).
Established that scalar modes propagate via disformal mechanisms, affecting C excitations.
Verified the results remain valid under specific theoretical frameworks like kinetic completion B' (Paper VII).

Abstract

We demonstrate that RCD satisfies the gravitational wave speed constraint |cT - c|/c < 1e-15 from GW170817. The tensor mode propagates on the conformally related Einstein metric with cT = c exactly, while scalar disformal propagation applies only to C excitations. This result holds for the minimal disformal action and remains exact under kinetic completion B' (Paper VII).

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GW170817 Constraints and Causal Structure

Key Points

Abstract

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