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arXiv 2008.01965gr-qchep-th
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非正则自引力静态多重标量场的无毛定理

No-hair theorems for non-canonical self-gravitating static multiple scalar fields

Daniela Doneva, Stoytcho Yazadjiev

摘要:

在一定的假设下,证明了球对称时空中非正则自引力静态多重标量场的无毛定理。结果表明,唯一的静态,球对称和渐近平坦的黑洞解由史瓦西度规和一个常数多标量映射组成。我们还证明了,有没有静态,水平,渐近平坦,球对称的解决方案,静态标量场和一个正规的中心。最后一个定理表明,静态的,渐近平坦的,球对称的反射紧致物体与诺依曼边界条件不能支持一个非平凡的自引力非正则(和正则)多标量映射在其外部时空区域。为了证明无毛定理,我们得到了一个新的散度恒等式。

英文摘要:

We prove under certain assumptions no-hair theorems for non-canonical self-gravitating static multiple scalar fields in spherically symmetric spacetimes. It is shown that the only static, spherically symmetric and asymptotically flat black hole solutions consist of the Schwarzschild metric and a constant multi-scalar map. We also prove that there are no static, horizonless, asymptotically flat, spherically symmetric solutions with static scalar fields and a regular center. The last theorem shows that the static, asymptotically flat, spherically symmetric reflecting compact objects with Neumann boundary conditions can not support a non-trivial self-gravitating non-canonical (and canonical) multi-scalar map in their exterior spacetime regions. In order to prove the no-hair theorems we derive a new divergence identity.

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