Dressing a black hole with a time-dependent Galileon

被引:327
作者
Babichev, Eugeny [1 ]
Charmousis, Christos [1 ,2 ]
机构
[1] Univ Paris 11, CNRS, UMR 8627, LPT, F-91405 Orsay, France
[2] Univ Tours, CNRS, UMR 6083, LMPT, Tours, France
关键词
Classical Theories of Gravity; Black Holes; SCALAR; EQUATIONS;
D O I
10.1007/JHEP08(2014)106
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We present a class of exact scalar-tensor black holes for a shift-symmetric part of the Horndeski action. The action includes a higher order scalar tensor interaction term. We find that for a static and spherically symmetric space-time, the scalar field, if time dependent, can be non-trivial and regular thus circumventing in an interesting way no-hair arguments for gallileons. Furthermore, within this class we find a stealth Schwarzschild and a partially self-tuned de-Sitter Schwarzschild black hole, both exhibiting a non trivial and regular space and time dependent scalar. In the latter solution the bulk vacuum energy is screened from a necessarily smaller geometric effective de Sitter vacuum via an integration constant associated to the time dependent scalar field.
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页数:10
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