Does GW170817 falsify MOND?

R. H. Sanders*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

The gravitational-wave event GW170817 and the near-simultaneous corresponding gamma-ray burst (GRB 170817 A) falsify modified gravity theories in which the gravitational geometry differs non-conformally from physical geometry. Thus, the observations of this event definitively rule out theories, such as TeVeS, a suggested relativistic extension of Milgrom's modified Newtonian dynamics (MOND), that predict a significantly different Shapiro delay for electromagnetic and gravitational radiation. While not falsifying MOND per se, GW170817 severely constrains relativistic extensions of MOND to theories that do not rely on additional matter-coupling fields but rather upon modified field equations for one universal gravitational and physical metric. Here, I mention a simple preferred-frame theory as an example.

Original languageEnglish
Article number1847027
Number of pages5
JournalInternational Journal of Modern Physics D
Volume27
Issue number14
DOIs
Publication statusPublished - Oct-2018

Keywords

  • Gravitational radiation
  • gamma-ray bursts
  • modified gravity theories
  • dark matter

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