标题： II型带有宇宙常数的扭转电磁真空解 显示英文标题

标题： A Twisting Electrovac Solution of Type II with the Cosmological Constant

摘要： 一个无电流的爱因斯坦-麦克斯韦方程组在宇宙常数情况下的精确解被提出。 它是Petrov II型，其双重主光矢是测地线、无剪切、膨胀且扭曲的。 该解包含五个常数。 其电磁场是非零且对齐的。 该解仅有一个Killing矢量，并包括几个已知解作为特例。 显示英文摘要

摘要： An exact solution of the current-free Einstein-Maxwell equations with the cosmological constant is presented. It is of Petrov type II, and its double principal null vector is geodesic, shear-free, expanding, and twisting. The solution contains five constants. Its electromagnetic field is non-null and aligned. The solution admits only one Killing vector and includes, as special cases, several known solutions.