Gravitational waves in braneworlds after multi-messenger events

Jan 23, 2020
10 pages
Published in:
  • Eur.Phys.J.C 80 (2020) 4, 316
  • Published: Apr 10, 2020
e-Print:

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Abstract: (Springer)
The GW170817 event opened a new window to test modifications to General Relativity with the aim of discard or impose strong constraints in extra dimension theories of gravity. Concerning these theories, the Randall–Sundrum brane-world theory – 4+1 spacetime model where its covariant Einstein field equations are composed with new extra terms that comes from extra dimensions – is begin tested in the multi-messenger astronomy field. In the same context, the aim of this paper is to impose new constrictions through measurements of the time-delay between the gravitational and electromagnetic signals: GW170817 and the recent S190425z, over the free cosmological parameters of this modified model. We assume that Gravitational Waves travel along a shortcut on the extra dimension. In addition, we consider the standard Λ\Lambda CDM model and perform a likelihood analysis in order to study effects like the H0H_0 tension in comparison to this extra-dimensional theory, obtaining a reduced H0H_0 value of the order of 0.2%0.2\% in the low energy limit of this theory.
Note:
  • 10 pages, 4 figures. Accepted for publication in EPJC
  • space-time: model
  • energy: low
  • gravitation: higher-dimensional
  • gravitational radiation
  • membrane model
  • statistical analysis
  • Randall-Sundrum model
  • cosmological model
  • general relativity
  • Einstein equation