Black Hole Mimickers in Astrophysical Configurations with Scalar Fields

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

Abstract

We study static spherically symmetric configurations of General Relativity in the presence of one scalar field (SF). For a monomial SF potential, the solutions of the Einstein SF equations are obtained numerically; then we get distributions of stable circular orbits around the configuration and build images of the corresponding “accretion disks” from the perspective of a distant observer. We discuss also a similar problem in the case of analytic solution with a specially selected SF potential that allows the existence of a black hole. We show that the images are similar in many cases to the case of ordinary Schwarzschild black hole with a luminous ring and a dark spot at the center. On the other hand, a certain selection of model parameters leads to specific features in these images that may help to exclude some exotic models.

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Published
2019-11-25
How to Cite
Stashko, O., & Zhdanov, V. (2019). Black Hole Mimickers in Astrophysical Configurations with Scalar Fields. Ukrainian Journal of Physics, 64(11), 1078. https://doi.org/10.15407/ujpe64.11.1078
Section
Fields and elementary particles