Galactic Rotation Curves in Conformal Scalar-Tensor Gravity

Li，Qiang1,2; Modesto，Leonardo2

2020-04-01

10.1134/S0202289320020085

Gravitation & Cosmology   影响因子和分区

0202-2893

1995-0721

Abstract: We show quantitatively that an exact solution of conformal scalar-tensor gravity can explain very well the galactic rotation curves for a sample of 104 galaxies without the need for dark matter or other exotic modification of gravity. The metric is an overall rescaling of the Schwarzschild-de Sitter space-time as required by Weyl conformal invariance, which has to be spontaneously broken, and the velocity of the stars depends only on two fixed universal parameters. Using the Monte Carlo Markov Chain (MCMC) method, we make a fit of the observational rotation curves in order to get the mass-to-light ratio for each galaxy. Finally, we analytically compare our model with the modified Newtonian dynamics (MOND) and the metric skew tensor gravity (MSTG) showing that the three theories have a very different behavior at very large distances.

SCI

英语

通讯

Astronomy & Astrophysics

Astronomy & Astrophysics

WOS:000564927300002

MAIK NAUKA/INTERPERIODICA/SPRINGER

2-s2.0-85089728585

Scopus

1.Department of Physics,Harbin Institute of Technology,Harbin,150001,China
2.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Li，Qiang,Modesto，Leonardo. Galactic Rotation Curves in Conformal Scalar-Tensor Gravity[J]. Gravitation & Cosmology,2020,26(2):99-117.

Li，Qiang,&Modesto，Leonardo.(2020).Galactic Rotation Curves in Conformal Scalar-Tensor Gravity.Gravitation & Cosmology,26(2),99-117.

Li，Qiang,et al."Galactic Rotation Curves in Conformal Scalar-Tensor Gravity".Gravitation & Cosmology 26.2(2020):99-117.