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DOI | 10.1103/PHYSREVD.87.084049 | ||||
Año | 2013 | ||||
Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The hedgehog ansatz for spherically symmetric spacetimes in self-gravitating nonlinear sigma models and Skyrme models is revisited and its generalization for nonspherically symmetric spacetimes is proposed. The key idea behind our construction is that, even if the matter fields depend on the Killing coordinates in a nontrivial way, the corresponding energy-momentum tensor can still be compatible with spacetime symmetries. Our generalized hedgehog ansatz reduces the Skyrme equations to coupled differential equations for two scalar fields together with several constraint equations between them. Some particular field configurations satisfying those constraints are presented in several physically important spacetimes, including stationary and axisymmetric spacetimes. Incidentally, new exact solutions are obtained under the standard hedgehog ansatz, one of which represents a global monopole inside a black hole with the Skyrme effect. DOI: 10.1103/PhysRevD.87.084049
Ord. | Autor | Género | Institución - País |
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1 | Canfora, Fabrizio | Hombre |
Centro de Estudios Científicos - Chile
Universidad Nacional Andrés Bello - Chile |
2 | Maeda, Hideki | Hombre |
Centro de Estudios Científicos - Chile
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Fuente |
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FONDECYT |
Chilean Government through the Centers of Excellence Base Financing Program of CONICYT |
JSPS |
Conicyt grant "Southern Theoretical Physics Laboratory'' |
Cosmophysics group in KEK for hospitality |
Agradecimiento |
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The authors thank Masato Nozawa for suggestions about the solutions (3.21) and (3.23). H.M. would like to thank the Cosmophysics group in KEK for hospitality and support. This work has been funded by the Fondecyt Grants No. 1120352 (F.C.) and No. 1100328, No. 1100755 (H.M.) and by the Conicyt grant "Southern Theoretical Physics Laboratory'' ACT-91. This work was also partly supported by the JSPS Grant-in-Aid for Scientific Research (A) (22244030). The Centro de Estudios Cientificos (CECs) is funded by the Chilean Government through the Centers of Excellence Base Financing Program of Conicyt. |