暗物质团块的双体碰撞
Binary Collisions of Dark Matter Blobs
AI总结：
本研究提出一种不依赖特定模型的暗物质双体并合机制，解释了大质量暗物质结构的形成与并合过程，给出并合率的估算方法，提出可通过引力和电磁信号探测这类并合，且其可能是高频引力波的独特来源，同时排除了与现有观测矛盾的暗天体。
摘要：
我们描述了一种不依赖于具体模型的机制：质量大于约$8\ imes 10^{11}$ GeV的暗物质及暗物质结构会在早期宇宙中形成双星对，这些双星对会在宇宙演化的整个历史进程中以及当下发生自旋衰减并并合，产生可能被观测到的信号。密度足够高的暗天体将主要通过双体并合而非随机碰撞发生碰撞。我们详细说明了如何估算并合率，该估算考虑了有限尺寸效应、多体相互作用以及与热浴的摩擦作用。我们预测了可通过引力信号和电磁信号探测致密暗天体并合的方式，并指出这类并合可能是高频引力波的独特来源。我们还排除了其存在会与宇宙微波背景（CMB）和弥散伽马射线观测结果相矛盾的天体。
英文摘要：
We describe the model-independent mechanism by which dark matter and dark matter structures heavier than $\sim 8\times 10^{11}$ GeV form binary pairs in the early Universe that spin down and merge both in the present and throughout the Universe's history, producing potentially observable signals. Sufficiently dense dark objects will dominantly collide through binary mergers instead of random collisions. We detail how one would estimate the merger rate accounting for finite size effects, multibody interactions, and friction with the thermal bath. We predict how mergers of dark dense objects could be detected through gravitational and electromagnetic signals, noting that such mergers could be a unique source of high frequency gravitational waves. We rule out objects whose presence would contradict observations of the CMB and diffuse gamma-rays.
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