论文标题
银河黑洞周围暗物质光环的潮汐效应
Tidal effects of dark matter halo around a galactic black hole
论文作者
论文摘要
我们已经调查了带有暗物质光环的银河系中黑洞的时空中的潮汐力和大地偏差运动。我们的结果表明，潮汐力和测量偏差运动取决于暗物质光环质量和典型的星系长度。典型的星系长度对潮汐力的影响与暗物质质量相反。对于径向潮汐力，随着暗物质质量的增加，它在远离黑洞的区域增加，但在黑洞附近的区域减少。对于角潮力，其角潮力的绝对值随着暗物质光环质量而单调增加。尤其是，角潮力也取决于粒子的能量，对于具有高能量的测试粒子，暗物质的效果与通常的静态黑洞空位不同。我们还介绍了在两种初始条件下的暗物质光环质量和星系的典型长度尺寸的地球偏差载体的变化。
We have investigated the tidal forces and geodesic deviation motion in the spacetime of a black hole in the galaxy with dark matter halo. Our results show that the tidal force and geodesic deviation motion depend on the dark matter halo mass and the typical lengthscale of galaxy. The effect of the typical lengthscale of galaxy on tidal force is opposite to that of dark matter mass. For the radial tidal force, with the increasing mass of dark matter, it increases in the region far from the black hole, but decreases in the region near black hole. For the angular tidal force, its absolute value of angular tidal force monotonously increases with the dark matter halo mass. Especially, the angular tidal force also depends on the particle's energy and the effects of dark matter become more distinct for the test particle with high energy, which is different from those in the usual static black hole spacetimes. We also present the change of geodesic deviation vector with the dark matter halo mass and the typical lengthscale of galaxy under two kinds of initial conditions.
