Spherically symmetric solution of the Weyl-Dirac theory of gravitation and possible influence of dark matter on the interplanetary spacecraft motion

TL;DR

This paper introduces a new conformal Weyl-Dirac gravitational theory incorporating a scalar field as a dark matter model, deriving solutions that could influence interplanetary spacecraft motion and allow parameter estimation from observations.

Contribution

It proposes a novel Weyl-Dirac gravity model with a scalar field representing dark matter, providing spherically symmetric solutions relevant for spacecraft trajectory analysis.

Findings

Derived static spherically symmetric vacuum solutions conformal to Yilmaz-Rosen metrics.

Showed the asymptotic line-of-sight velocity depends on model parameters.

Suggested observational data can estimate parameters of the gravitational model.

Abstract

The Poincare and Poincare-Weyl gauge theories of gravitation with Lagrangians quadratic on curvature and torsion in post-Riemannian spaces with the Dirac scalar field is discussed in a historical aspect. The various hypothesizes concerning the models of a dark matter with the help of a scalar field are considered. The new conformal Weyl-Dirac theory of gravitation is proposed, which is a gravitational theory in Cartan-Weyl space-time with the Dirac scalar field representing the dark matter model. A static spherically symmetric solution of the field equations in vacuum for a central compact mass is obtained as the metrics conformal to the Yilmaz-Rosen metrics. On the base of this solution one considers a radial movement of an interplanetary spacecraft starting from the Earth. Using the Newton approximation one obtains that the asymptotic line-of-sight velocity in this case depends from the parameters of the solution, and therefore one can obtain on basis of the observable data the values of these parameters.