Spherically symmetric configurations of General Relativity in presence of scalar fields: separation of circular orbits

被引：11

作者：

Stashko, O. S. ^{[1
]}

Zhdanov, V. I. ^{[1
]}

机构：

[1] Taras Shevchenko Natl Univ Kyiv, Astron Observ, Observ St 3, UA-04053 Kiev, Ukraine

来源：

GENERAL RELATIVITY AND GRAVITATION | 2018年 / 50卷 / 09期

关键词：

Black holes; Naked singularities; Circular orbits; Scalar fields; Accretion disks;

D O I：

10.1007/s10714-018-2425-x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the test body stable circular orbits around the spherically symmetric black hole (BH) configuration can form disjoint structures in presence of a minimally coupled nonlinear scalar field. General conditions for the disjoint structures to exist are formulated. To present examples we construct a two-parametric family of exact solutions to Einstein equations with scalar fields for appropriate self-interaction potentials. For different values of the family parameters the solutions describe either BH or naked singularity (NS). We found numerically regions of the parameters when there exist two disjoint regions of stable circular orbits; such nonconnected structures indeed can exist in case of both BH and NS solutions.

引用

页数：19