Conformal gravity rotation curves with a conformal Higgs halo

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We discuss the effect of a conformally coupled Higgs field on Conformal Gravity (CG) predictions for the rotation curves of galaxies. The Mannheim-Kazanas (MK) metric is a valid vacuum solution of CG's 4-th order Poisson equation if and only if the Higgs field has a particular radial profile, S(r) = S0a/(r + a), decreasing from S0 at r = 0 with radial scale length a. Since particle rest masses scale with S(r)/S0, their world lines do not follow time-like geodesics of the MK metric gμν, as previously assumed, but rather those of the Higgs-frame MK metric μν = Ω2 gμν, with the conformal factor Ω(r) = S(r)/S0. We show that the required stretching of the MK metric exactly cancels the linear potential that has been invoked to fit galaxy rotation curves without dark matter. We also formulate, for spherical structures with a Higgs halo S(r), the CG equations that must be solved for viable astrophysical tests of CG using galaxy and cluster dynamics and lensing.
Original languageEnglish
Pages (from-to)4122-4128
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume458
Issue number4
Early online date7 Mar 2016
DOIs
Publication statusPublished - 1 Jun 2016

Keywords

  • Gravitation
  • Galaxies: kinematics and dynamics
  • Cosmoslogy: theory, dark matter, dark energy

Fingerprint

Dive into the research topics of 'Conformal gravity rotation curves with a conformal Higgs halo'. Together they form a unique fingerprint.

Cite this