Anisotropic stress as signature of non-standard propagation of gravitational waves

• Verfasst von: Saltas, Ippocratis D. [VerfasserIn]
• Verfasst von: Sawicki, Ignacy [VerfasserIn]
• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Anisotropic stress as signature of non-standard propagation of gravitational waves
• Verf.angabe: Ippocratis D. Saltas, Ignacy Sawicki, Luca Amendola, and Martin Kunz
• Fussnoten: Gesehen am 16.11.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2014
• Band/Heft Quelle: (2014) Artikel-Nummer 1406.7139, 7 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565228944

Abstract

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.