Capture and critical scattering of a long cosmic string by a rotating black hole
Capture and critical scattering of a long cosmic string by a rotating black hole
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旋转黑洞对长宇宙弦的捕获和临界散射
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
V. Frolov
中科院分区：
文献类型：
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作者：
M. Snajdr;V. Frolov
考虑了具有旋转参数a的旋转黑洞对无限长直宇宙弦的捕获。我们假设一根弦以速度v运动，最初弦平行于黑洞的旋转轴，并且具有碰撞参数B。弦可以被黑洞散射或捕获。我们证明，存在一个临界值的影响参数bc（v，a），这两个政权分开。利用数值模拟，我们得到了不同的旋转参数α值的临界冲击参数曲线。我们表明，对于弦的逆时针运动，这条曲线低于逆时针运动的曲线。此外，超相对论弦运动的方向和近极值黑洞的临界碰撞参数曲线被发现是一个多值函数的v.我们得到真实的时间分布的散射字符串在政权接近临界。我们还研究了相对论和超相对论区域中旋转黑洞对弦的临界散射和俘获，特别是相对论效应如线圈形成和缠绕效应。
The capture of a straight, infinitely long cosmic string by a rotating black hole with rotation parameter a is considered. We assume that a string is moving with velocity v and that initially the string is parallel to the axis of rotation of the black hole and has the impact parameter b. The string can be either scattered or captured by the black hole. We demonstrate that there exists a critical value of the impact parameter bc(v, a) which separates these two regimes. Using numerical simulations we obtain the critical impact parameter curve for different values of the rotation parameter a. We show that for the prograde motion of the string this curve lies below the curve for the retrograde motion. Moreover, for ultrarelativistic strings moving in the prograde direction and nearly extremal black holes the critical impact parameter curve is found to be a multiply valued function of v. We obtain real time profiles of the scattered strings in the regime close to the critical. We also study critical scattering and capture of strings by the rotating black hole in the relativistic and ultrarelativistic regimes and especially such relativistic effects as coil formation and wrapping effect.