Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-07-27
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
18 pages, 12 figures
Scientific paper
We study the time evolution of the radial perturbation for self-gravitating soliton and black-hole solutions in a generalized Skyrme model in which a dilaton is present. The background solutions were obtained recently by some of the authors. For both the solitons and the black holes two branches of solutions exist which merge at some critical value of the corresponding parameter. The results show that similarly to the case without scalar field one of the branches is stable against radial perturbations and the other is unstable. The conclusions for the linear stability of the black holes in the generalized Skyrme model are also in agreement with the results from the thermodynamical stability analysis based on the turning point method.
Doneva Daniela D.
Kokkotas Kostas D.
Stefanov Ivan Zh
Yazadjiev Stoytcho S.
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