搅动和摇动：玻色子星和暗物质核的动力学行为
Stirred and shaken: dynamical behavior of boson stars and dark matter cores
摘要：
玻色子场可以产生自引力结构。这些都是有趣的假设新的“暗物质星”和良好的描述暗物质晕，如果领域是非常轻的。本文研究了牛顿玻色子星（NBS）在其周围的外部物质（恒星、行星或黑洞）激发下的动力学响应。我们的设置可以描述大质量黑洞和周围环境之间的相互作用，在大质量物体经历了“踢”之后不久，由于银河系中心的重子物质的坍缩，或者暗物质耗尽作为对螺旋双星的反应。我们执行的第一个自洽计算的动力学摩擦作用在这些背景下的运动物体。二进制接近合并“搅拌”的NBS核心，和逆反应影响引力波形在领先的$-6PN$顺序相对于占主导地位的四极项;系数太小，允许检测下一代干涉仪。我们还表明，引力坍缩到一个超大质量黑洞在中心的NBS是伴随着只有一个小的变化，在周围的核心。NBS最终会被吸积，但对于天体物理参数来说，这只会发生在几个哈勃时间之后。
英文摘要：
Bosonic fields can give rise to self-gravitating structures. These are interesting hypothetical new "dark matter stars" and good descriptions of dark matter haloes if the fields are very light. We study the dynamical response of Newtonian boson stars (NBS) when excited by external matter (stars, planets or black holes) in their vicinities. Our setup can describe the interaction between a massive black hole and the surrounding environment, shortly after the massive body has undergone a "kick", due to the collapse of baryonic matter at the galactic center, or dark matter depletion as a reaction to an inspiralling binary. We perform the first self-consistent calculation of dynamical friction acting on moving bodies in these backgrounds. Binaries close to coalescence "stir" the NBS core, and backreaction affects gravitational waveforms at leading $-6PN$ order with respect to the dominant quadrupolar term; the coefficient is too small to allow detection by next-generation interferometers. We also show that the gravitational collapse to a supermassive black hole at the center of a NBS is accompanied by only a small change in the surrounding core. The NBS eventually gets accreted, but for astrophysical parameters this occurs only after several Hubble times.
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