论文标题
踢起来的黑洞二进制
Kicks in charged black hole binaries
论文作者
论文摘要
我们计算出在准圆形带电黑洞二进制的完全普通的数值发展中，通过重力和电磁辐射的线性动量（踢）发射。我们得出缓慢移动的身体的分析表达式，并在数值上探索各种质量比和电荷与质量比率。我们发现，对于相等的质量案例，我们的分析表达与观察到的值非常吻合，并且与真空案例中发生的情况相反，我们发现在存在电磁场的情况下，通过引力波排出动量。我们还发现，具有不平等质量的二进制的强力踢会影响电磁踢，从而使它们与开普勒预测强烈偏离。对于这项工作中考虑的电荷与质量比的值，我们观察到电磁踢的幅度总是比重力小。
We compute the emission of linear momentum (kicks) by both gravitational and electromagnetic radiation in fully general-relativistic numerical evolutions of quasi-circular charged black hole binaries. We derive analytical expressions for slowly moving bodies and explore numerically a variety of mass ratios and charge-to-mass ratios. We find that for the equal mass case our analytical expression is in excellent agreement with the observed values and, contrarily to what happens in the vacuum case, we find that in presence of electromagnetic fields there is emission of momentum by gravitational waves. We also find that the strong gravitational kicks of binaries with unequal masses affect the electromagnetic kicks, causing them to strongly deviate from Keplerian predictions. For the values of charge-to-mass ratio considered in this work, we observe that magnitudes of the electromagnetic kicks are always smaller than the gravitational ones.
