AI 中文总结
该研究提出了浸没于外磁场中的旋转带电黑洞时空精确解，识别出纯Kerr黑洞，分析其物理性质，弱场极限退化为Wald解。
AI 中文摘要
我们提出了一种描述旋转带电黑洞浸没于外磁场中的时空。该爱因斯坦-麦克斯韦方程的精确解形式极为简洁，可约化为标准Kerr-Newman度规和均匀Bertotti-Robinson（BR）磁宇宙。我们证明[Phys. Rev. Lett. {\bf 135}, 181401 (2025)]中给出的Kerr-BR解具有特殊电荷，并在磁场中识别出无任何电荷的纯Kerr黑洞。在弱场极限下，该解退化为Wald解。我们分析了该新解族的主要物理性质，包括奇点、视界、轴的正则性、电荷、熵和温度。
英文摘要
We present a spacetime that describes a rotating and charged black hole immersed in an external magnetic field. This exact solution to the Einstein-Maxwell equations has a surprisingly simple form which reduces to standard Kerr-Newman metric, and to the uniform Bertotti-Robinson magnetic universe. We show that the Kerr-BR solution presented in [Phys. Rev. Lett. {\bf 135}, 181401 (2025)] has a special charge, and we identify a genuine Kerr black hole without any charge, in the magnetic field. In the weak-field limit it gives the Wald solution. We analyze main physical properties of the new family, namely singularities, horizons, regularity of axes, charges, entropy and temperature.
Comments8 pages, 1 figure
