Spherically Symmetric Configurations in General Relativity in the Presence of a Linear Massive Scalar Field: Separation of a Distribution of Test Body Circular Orbits

  • O. S. Stashko Taras Shevchenko National University of Kyiv, Ukraine
  • V. I. Zhdanov Taras Shevchenko National University of Kyiv, Ukraine
Keywords: relativistic astrophysical objects, scalar fields, accretion disks

Abstract

We study static spherically symmetric configurations in the presence of linear massive scalar fields within General Relativity. Static solutions of the Einstein equations are considered under conditions of asymptotic flatness. Each solution is fixed by the configuration mass and the field strength parameter, which are defined at spatial infinity. The metric coefficients and the scalar field for a specific configuration are obtained numerically. Then we study the time-like geodesics describing the test particle motion. The focus is on the distribution of stable circular orbits (SCOs) of the test particles around a configuration. We found that, for the continuum of configuration parameters, there exist two unlinked regions of SCOs that are separated by some annular region, where SCOs do not exist.

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Published
2019-04-01
How to Cite
Stashko, O., & Zhdanov, V. (2019). Spherically Symmetric Configurations in General Relativity in the Presence of a Linear Massive Scalar Field: Separation of a Distribution of Test Body Circular Orbits. Ukrainian Journal of Physics, 64(3), 189. https://doi.org/10.15407/ujpe64.3.189
Section
Fields and elementary particles