标题： 黑洞双星中的准局部线性动量 显示英文标题

标题： Quasi-Local Linear Momentum in Black-Hole Binaries

摘要： 我们提出了一种准局部公式，用于计算黑洞视界的线动量，该公式受到准局部视界形式主义的启发。 我们通过两种互补的配置来测试这个公式：(i) 通过计算质量不相等、自旋为零、准圆轨道的双黑洞系统的较大轨道线动量；(ii) 通过计算质量相等、自旋方向相反的双黑洞正面碰撞后残余物所获得的非常小的反冲动量。 我们在绕行情况下获得了与视界轨迹一致的结果，并在正面碰撞的反冲速度较小的情况下，获得了与净辐射线动量一致的结果。 显示英文摘要

摘要： We propose a quasi-local formula for the linear momentum of black-hole horizons inspired by the formalism of quasi-local horizons. We test this formula using two complementary configurations: (i) by calculating the large orbital linear momentum of the two black holes in an unequal-mass, zero-spin, quasi-circular binary and (ii) by calculating the very small recoil momentum imparted to the remnant of the head-on collision of an equal-mass, anti-aligned-spin binary. We obtain results consistent with the horizon trajectory in the orbiting case, and consistent with the net radiated linear momentum for the much smaller head-on recoil velocity.