Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 56, p. 35-39 (2017)
Circular orbits around a spherically symmetric relativistic configuration in the presence of a phantom scalar field
Stashko O., stud.
Zhdanov V., prof.
Astronomical Observatory of Taras Shevchenko National University of Kyiv, Kyiv
Abstract
We consider exact solutions of the joint system of Einstein equations and phantom scalar field equations with a special massless self-interaction potential. We studied orbits of the test bodies, which interact only gravitationally, in the space-time corresponding to these solutions. The main attention is paid to the stable circular orbits. We found conditions for existence of disjoint regions of stable circular orbits, which can be separated by regions of unstable orbits or regions of non-existence of circular orbits.
Key words
Phantom scalar field
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