Testing modified gravity theory in the Milky Way

Carolina Negrelli, Maria Benito, Susana Landau, Fabio Iocco, and Lucila Kraiselburd
Phys. Rev. D 98, 104061 – Published 30 November 2018
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Abstract

We perform a test of John Moffat’s modified gravity theory (MOG) within the Milky Way, adopting the well-known “rotation curve” method. We use the dynamics of observed tracers within the disk to determine the gravitational potential as a function of galactocentric distance and compare that with the potential that is expected to be generated by the visible component only (stars and gas) under different “flavors” of the MOG theory, making use of a state-of-the-art setup for both the observed tracers and baryonic morphology. Our analysis shows that in both the original and the modified version (considering a self-consistent evaluation of the Milky Way mass), the theory fails to reproduce the observed rotation curve. We conclude that in none of its present formulations is the MOG theory able to explain the observed rotation curve of the Milky Way.

  • Figure
  • Received 21 March 2018

DOI:https://doi.org/10.1103/PhysRevD.98.104061

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Carolina Negrelli1,2,*, Maria Benito3, Susana Landau4,2, Fabio Iocco3, and Lucila Kraiselburd1,2

  • 1Grupo de Astrofísica, Relatividad y Cosmología, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata, Argentina
  • 2CONICET, Godoy Cruz 2290, 1425 Ciudad Autnoma de Buenos Aires, Argentina
  • 3ICTP–South American Institute for Fundamental Research, and Instituto de Física Teórica / Universidade Estadual Paulista (UNESP), Rua Dr. Bento Teobaldo Ferraz 271, 01140-070 São Paulo, SP Brazil
  • 4Departamento de Física and IFIBA, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria-Pab. I, Buenos Aires 1428, Argentina

  • *cnegrelli@fcaglp.unlp.edu.ar

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Issue

Vol. 98, Iss. 10 — 15 November 2018

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