标题： 来自准圆轨道双星系统的陀螺引力记忆 显示英文标题

标题： Gyroscopic Gravitational Memory from quasi-circular binary systems

摘要： 引力波会使自由下落的自旋物体产生进动，并在波通过后导致净方向改变，这种现象被称为陀螺记忆。 本文中，我们将考虑后牛顿近似框架下的孤立引力源，并计算陀螺进动和记忆的主要后牛顿（PN）阶效应。 我们将两种竞争性贡献进行比较：自旋记忆和非线性螺旋流。 在进动率层面，前者是2PN振荡效应，而后者是4PN绝热效应。 然而，陀螺记忆涉及时间积分，这会将次主导绝热效应增强到光速的五次幂，从而产生1.5PN的记忆效应。 我们明确计算了准圆轨道双星系统的主要效应，并得到了记忆在天球上的角依赖性。 显示英文摘要

摘要： Gravitational waves cause a precession in a freely falling spinning object and a net change of orientation after the passage of the wave, dubbed as the gyroscopic memory. In this paper, we will consider isolated gravitational sources in the post-Newtonian framework and compute the gyroscopic precession and memory at leading post-Newtonian (PN) orders. We make a comparison between two competing contributions: the spin memory and the nonlinear helicity flux. At the level of the precession rate, the former is a 2PN oscillatory effect, while the latter is a 4PN adiabatic effect. However, the gyroscopic memory involves a time integration, which enhances subleading adiabatic effects by the fifth power of the velocity of light, leading to a 1.5PN memory effect. We explicitly compute the leading effects for a quasi-circular binary system and obtain the angular dependence of the memory on the celestial sphere.