论文标题
由多个轴突组成的银河冷凝物
Galactic Condensates composed of Multiple Axion Species
论文作者
论文摘要
尽管最小的场景越来越受到限制,但已提出超轻标量暗物质构成了暗物质的组成部分。在这项工作中,我们分析了暗物质由多个超轻玻色子组成的场景,每个玻色子都有不同的质量。这有可能导致与由单个标量场组成的冷凝物截然不同的结构形成重力结合的玻璃体污水凝结物。通过从富有理解的单品味案例中概括,我们探索了符合稳定性标准的大量输入参数,并确定两种降温冷凝物的允许参数空间是粒子物理参数的函数,并特别注意该冷凝物可以组成银河系核的情况。我们还分析了受巨大内部体外重力受到外部重力的单料冷凝物,发现这种系统也可能模仿银河核的大小。
Ultralight scalar dark matter has been proposed to constitute a component of dark matter, though the minimal scenarios have increasingly become constrained. In this work, we analyze scenarios where the dark matter consists of more than one ultralight boson, each with different masses. This potentially leads to formation of gravitationally-bound Bose-Einstein condensates with structures that are very different from condensates composed of a single scalar field. By generalizing from the well-understood single-flavor case, we explore a large range of input parameters, subject to stability criteria, and determine the allowed parameter space for two-flavor condensates as a function of particle physics parameters, paying particular attention to cases where such condensates could compose galactic cores. We also analyze single-flavor condensates subject to external gravity from massive inner bodies and find that such systems may mimic the size of galactic cores as well.