论文标题
紧凑型物体的多重矩具有螺母：理论和观察性含义
Multipole moments of compact objects with NUT charge: Theoretical and observational implications
论文作者
论文摘要
我们使用Geroch-Hansen形式主义得出了Kerr-Nut黑洞时空的多极矩，即使该时空不是渐近平坦的。有趣的是，在存在螺母电荷的情况下，与赤道平面的反射对称性不存在，导致所有阶的质量和自旋多极矩与类似Kerr样的空位形成鲜明对比。这导致了带有螺母电荷的紧凑物体的多极结构的急剧出现，该物体对重力波观测的影响已被探索。我们对Kerr-Nut时空的多极矩的分析也与Thorne的方法相吻合。
We derive the multipole moments of the Kerr-NUT black hole spacetime using the Geroch-Hansen formalism, even though the spacetime is not asymptotically flat. Intriguingly, in the presence of the NUT charge, the absence of reflection symmetry about the equatorial plane, leads to mass and spin multipole moments of all orders, in stark contrast to Kerr-like spacetimes. This leads to a drastic departure of the multipolar structure of a compact object with NUT charge, whose implications for gravitational wave observations have been explored. Our analysis of multipole moments for the Kerr-NUT spacetime is also in tune with the Thorne's approach.
