Dilatonic Black Holes in Higher Curvature String Gravity
Dilatonic Black Holes in Higher Curvature String Gravity
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高曲率弦引力中的膨胀黑洞
DOI：
10.1103/physrevd.54.5049
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
E.Winstanley
中科院分区：
文献类型：
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作者：
P.Kanti;N.E.mavromatos;J.Rizos;K.Tamvakis;E.Winstanley
给出了二维有效超弦作用在高斯-博内二次曲率项下黑洞解的存在性的解析论证和数值证明。解具有非平凡的膨胀毛。然而，这些毛发属于“次级类型”，因为膨胀电荷是用黑洞质量来表示的。我们的解没有被“无毛”定理的现有证明的假设所覆盖。我们还找到了一些具有奇异度量行为但能量有限的替代解。指出了该系统不存在裸奇点。
We give analytical arguments and demonstrate numerically the existence of black hole solutions of the 4 D Effective Superstring Action in the presence of Gauss-Bonnet quadratic curvature terms. The solutions possess non-trivial dilaton hair. The hair, however, is of “secondary type”, in the sense that the dilaton charge is expressed in terms of the black hole mass. Our solutions are not covered by the assumptions of existing proofs of the “no-hair” theorem. We also find some alternative solutions with singular metric behaviour, but finite energy. The absence of naked singularities in this system is pointed out.