Effects of Scalar-Tensor-Vector Gravity on relativistic jets

Abstract

Scalar-Tensor-Vector Gravity (STVG) is a theory that does not require dark components to describe astrophysical data. We aim at constraining the free parameters of STVG based on recent observations of the jet in M87. We derive the equations of motion for particles in STVG-Kerr spacetime, we develop a numerical code that integrates such equations, and apply it to the jet of M87. We find that STVG deviates from GR and we set new upper limits for the free parameters of the former. We conclude that STVG is not contradicted by the observational data of M87, and may help to explain jet formation.

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Notes

  1. 1.

    Compared with the original action in Moffat (2006), we drop the cosmological constant term because its effects are locally negligible. We also ignore the scalar field \(\omega \) and set the potential \(W(\phi )=0\) as suggested by Moffat and Rahvar (2013), Moffat (2006), respectively.

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Correspondence to Federico G. Lopez Armengol.

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Lopez Armengol, F.G., Romero, G.E. Effects of Scalar-Tensor-Vector Gravity on relativistic jets. Astrophys Space Sci 362, 214 (2017). https://doi.org/10.1007/s10509-017-3197-6

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Keywords

  • Astrophysical jets
  • Modified gravity