标题： 旋转粒子在带电旋转黑洞背景中的最内稳定圆轨道 显示英文标题

标题： Innermost stable circular orbit of spinning particle in charged spinning black hole background

摘要： 在本文中，我们研究了经典自旋测试粒子在Kerr-Newman黑洞背景下的最内稳定圆轨道(ISCO)。 结果显示，自旋粒子的轨道与测试粒子的自旋有关。 如果测试粒子的自旋过大，其运动将超光速。 我们通过考虑黑洞背景中ISCO的超光速约束给出了一个额外条件。 我们数值地得到了ISCO与黑洞和测试粒子属性之间的关系。 发现自旋测试粒子的ISCO半径小于非自旋测试粒子在黑洞背景中的ISCO半径。 显示英文摘要

摘要： In this paper we investigate the innermost stable circular orbit (ISCO) for a classical spinning test particle in the background of Kerr-Newman black hole. It is shown that the orbit of the spinning particle is related to the spin of the test particle. The motion of the spinning test particle will be superluminal if its spin is too large. We give an additional condition by considering the superluminal constraint for the ISCO in the black hole backgrounds. We obtain numerically the relations between the ISCO and the properties of the black holes and the test particle. It is found that the radius of the ISCO for a spinning test particle is smaller than that of a non-spinning test particle in the black hole backgrounds.