期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.191101
关键词
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资金
- DFG through TRR33 The Dark Universe
- Swiss National Science Foundation
- Marie Sklodowska-Curie Intra-European Fellowship Project DRKFRCS
- STFC consolidating grant
- Science and Technology Facilities Council [ST/J000388/1] Funding Source: researchfish
- STFC [ST/J000388/1] Funding Source: UKRI
We make precise the heretofore ambiguous statement that anisotropic stress is a sign of a modification of gravity. We show that in cosmological solutions of very general classes of models extending gravity-all scalar-tensor theories (Horndeski), Einstein-aether models, and bimetric massive gravity-a direct correspondence exists between perfect fluids apparently carrying anisotropic stress and a modification in the propagation of gravitational waves. Since the anisotropic stress can be measured in a model-independent manner, a comparison of the behavior of gravitational waves from cosmological sources with large-scale-structure formation could, in principle, lead to new constraints on the theory of gravity.
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