标题： 正面对撞的两个不同质量的黑洞 显示英文标题

标题： Head--on Collision of Two Unequal Mass Black Holes

摘要： 我们展示了首次对两个不同质量黑洞正面碰撞的完全非线性数值计算结果。显示了主导的l=2、3和4准正常模的波形，以及一系列质量比和初始分离距离下的总辐射能量和反冲速度。我们的结果验证了接近和远距离分离极限的微扰研究，并表明正面碰撞情景不太可能产生天体物理上有意义的反冲效应。 显示英文摘要

摘要： We present results from the first fully nonlinear numerical calculations of the head--on collision of two unequal mass black holes. Selected waveforms of the most dominant l=2, 3 and 4 quasinormal modes are shown, as are the total radiated energies and recoil velocities for a range of mass ratios and initial separations. Our results validate the close and distant separation limit perturbation studies, and suggest that the head--on collision scenario is not likely to produce an astrophysically significant recoil effect.